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Name	Size	Permission
audiodata	[ DIR ]	drwxr-xr-x
certdata	[ DIR ]	drwxr-xr-x
cjkencodings	[ DIR ]	drwxr-xr-x
configdata	[ DIR ]	drwxr-xr-x
crashers	[ DIR ]	drwxr-xr-x
data	[ DIR ]	drwxr-xr-x
decimaltestdata	[ DIR ]	drwxr-xr-x
dtracedata	[ DIR ]	drwxr-xr-x
encoded_modules	[ DIR ]	drwxr-xr-x
imghdrdata	[ DIR ]	drwxr-xr-x
leakers	[ DIR ]	drwxr-xr-x
libregrtest	[ DIR ]	drwxr-xr-x
regrtestdata	[ DIR ]	drwxr-xr-x
sndhdrdata	[ DIR ]	drwxr-xr-x
subprocessdata	[ DIR ]	drwxr-xr-x
support	[ DIR ]	drwxr-xr-x
test_asyncio	[ DIR ]	drwxr-xr-x
test_capi	[ DIR ]	drwxr-xr-x
test_concurrent_futures	[ DIR ]	drwxr-xr-x
test_cppext	[ DIR ]	drwxr-xr-x
test_ctypes	[ DIR ]	drwxr-xr-x
test_dataclasses	[ DIR ]	drwxr-xr-x
test_doctest	[ DIR ]	drwxr-xr-x
test_email	[ DIR ]	drwxr-xr-x
test_future_stmt	[ DIR ]	drwxr-xr-x
test_gdb	[ DIR ]	drwxr-xr-x
test_import	[ DIR ]	drwxr-xr-x
test_importlib	[ DIR ]	drwxr-xr-x
test_inspect	[ DIR ]	drwxr-xr-x
test_json	[ DIR ]	drwxr-xr-x
test_lib2to3	[ DIR ]	drwxr-xr-x
test_module	[ DIR ]	drwxr-xr-x
test_multiprocessing_fork	[ DIR ]	drwxr-xr-x
test_multiprocessing_forkserve...	[ DIR ]	drwxr-xr-x
test_multiprocessing_spawn	[ DIR ]	drwxr-xr-x
test_peg_generator	[ DIR ]	drwxr-xr-x
test_pydoc	[ DIR ]	drwxr-xr-x
test_sqlite3	[ DIR ]	drwxr-xr-x
test_tkinter	[ DIR ]	drwxr-xr-x
test_tomllib	[ DIR ]	drwxr-xr-x
test_tools	[ DIR ]	drwxr-xr-x
test_ttk	[ DIR ]	drwxr-xr-x
test_unittest	[ DIR ]	drwxr-xr-x
test_warnings	[ DIR ]	drwxr-xr-x
test_zipfile	[ DIR ]	drwxr-xr-x
test_zoneinfo	[ DIR ]	drwxr-xr-x
tokenizedata	[ DIR ]	drwxr-xr-x
tracedmodules	[ DIR ]	drwxr-xr-x
typinganndata	[ DIR ]	drwxr-xr-x
wheeldata	[ DIR ]	drwxr-xr-x
xmltestdata	[ DIR ]	drwxr-xr-x
ziptestdata	[ DIR ]	drwxr-xr-x
Sine-1000Hz-300ms.aif	60.25 KB	-rw-r--r--
__init__.py	47 B	-rw-r--r--
__main__.py	67 B	-rw-r--r--
_test_atexit.py	3.61 KB	-rw-r--r--
_test_eintr.py	17.75 KB	-rw-r--r--
_test_embed_set_config.py	8.64 KB	-rw-r--r--
_test_embed_structseq.py	1.99 KB	-rw-r--r--
_test_multiprocessing.py	206.66 KB	-rw-r--r--
_test_venv_multiprocessing.py	796 B	-rw-r--r--
archiver_tests.py	6.1 KB	-rw-r--r--
audiotest.au	27.48 KB	-rw-r--r--
audiotests.py	12.13 KB	-rw-r--r--
audit-tests.py	13.19 KB	-rw-r--r--
autotest.py	214 B	-rw-r--r--
badsyntax_pep3120.py	14 B	-rw-r--r--
bisect_cmd.py	5.34 KB	-rwxr-xr-x
clinic.test.c	138.59 KB	-rw-r--r--
cmath_testcases.txt	141.2 KB	-rw-r--r--
curses_tests.py	1.21 KB	-rwxr-xr-x
datetimetester.py	260.28 KB	-rw-r--r--
dis_module.py	76 B	-rw-r--r--
empty.vbs	70 B	-rw-r--r--
exception_hierarchy.txt	2.33 KB	-rw-r--r--
floating_points.txt	15.92 KB	-rw-r--r--
fork_wait.py	2.29 KB	-rw-r--r--
formatfloat_testcases.txt	7.45 KB	-rw-r--r--
ieee754.txt	3.15 KB	-rw-r--r--
levenshtein_examples.json	406.44 KB	-rw-r--r--
list_tests.py	16.64 KB	-rw-r--r--
lock_tests.py	35.48 KB	-rw-r--r--
mailcap.txt	1.24 KB	-rw-r--r--
mapping_tests.py	21.87 KB	-rw-r--r--
math_testcases.txt	23.19 KB	-rw-r--r--
memory_watchdog.py	711 B	-rw-r--r--
mime.types	47.37 KB	-rw-r--r--
mock_socket.py	3.69 KB	-rw-r--r--
mp_fork_bomb.py	448 B	-rw-r--r--
mp_preload.py	351 B	-rw-r--r--
multibytecodec_support.py	14.19 KB	-rw-r--r--
pickletester.py	143.84 KB	-rw-r--r--
profilee.py	2.97 KB	-rw-r--r--
pstats.pck	65.05 KB	-rw-r--r--
pyclbr_input.py	648 B	-rw-r--r--
pythoninfo.py	28.32 KB	-rw-r--r--
randv2_32.pck	7.34 KB	-rw-r--r--
randv2_64.pck	7.19 KB	-rw-r--r--
randv3.pck	7.82 KB	-rw-r--r--
re_tests.py	25.93 KB	-rwxr-xr-x
recursion.tar	516 B	-rw-r--r--
regrtest.py	1.27 KB	-rwxr-xr-x
relimport.py	27 B	-rw-r--r--
reperf.py	538 B	-rw-r--r--
seq_tests.py	14.96 KB	-rw-r--r--
signalinterproctester.py	3.12 KB	-rw-r--r--
ssl_servers.py	7.12 KB	-rw-r--r--
ssltests.py	1.03 KB	-rw-r--r--
string_tests.py	71.24 KB	-rw-r--r--
test___all__.py	5.04 KB	-rw-r--r--
test__locale.py	8.09 KB	-rw-r--r--
test__opcode.py	4.14 KB	-rw-r--r--
test__osx_support.py	13.62 KB	-rw-r--r--
test__xxinterpchannels.py	52.19 KB	-rw-r--r--
test__xxsubinterpreters.py	27.5 KB	-rw-r--r--
test_abc.py	23.81 KB	-rw-r--r--
test_abstract_numbers.py	5.81 KB	-rw-r--r--
test_aifc.py	17.84 KB	-rw-r--r--
test_argparse.py	189 KB	-rw-r--r--
test_array.py	55.27 KB	-rwxr-xr-x
test_asdl_parser.py	4.44 KB	-rw-r--r--
test_ast.py	140.71 KB	-rw-r--r--
test_asyncgen.py	47.39 KB	-rw-r--r--
test_atexit.py	3.2 KB	-rw-r--r--
test_audioop.py	28.32 KB	-rw-r--r--
test_audit.py	8.6 KB	-rw-r--r--
test_augassign.py	7.68 KB	-rw-r--r--
test_base64.py	35.05 KB	-rw-r--r--
test_baseexception.py	7.77 KB	-rw-r--r--
test_bdb.py	43.75 KB	-rw-r--r--
test_bigaddrspace.py	2.83 KB	-rw-r--r--
test_bigmem.py	45.01 KB	-rw-r--r--
test_binascii.py	19.35 KB	-rw-r--r--
test_binop.py	14.14 KB	-rw-r--r--
test_bisect.py	16.63 KB	-rw-r--r--
test_bool.py	14.25 KB	-rw-r--r--
test_buffer.py	171.31 KB	-rw-r--r--
test_bufio.py	2.56 KB	-rw-r--r--
test_builtin.py	95.14 KB	-rw-r--r--
test_bytes.py	80.57 KB	-rw-r--r--
test_bz2.py	42.61 KB	-rw-r--r--
test_c_locale_coercion.py	20.99 KB	-rw-r--r--
test_calendar.py	51.25 KB	-rw-r--r--
test_call.py	35.21 KB	-rw-r--r--
test_cgi.py	22.27 KB	-rw-r--r--
test_cgitb.py	2.62 KB	-rw-r--r--
test_charmapcodec.py	1.77 KB	-rw-r--r--
test_class.py	19.77 KB	-rw-r--r--
test_clinic.py	83.96 KB	-rw-r--r--
test_cmath.py	23.55 KB	-rw-r--r--
test_cmd.py	6.49 KB	-rw-r--r--
test_cmd_line.py	39.51 KB	-rw-r--r--
test_cmd_line_script.py	34.93 KB	-rw-r--r--
test_code.py	25.7 KB	-rw-r--r--
test_code_module.py	5.53 KB	-rw-r--r--
test_codeccallbacks.py	47.43 KB	-rw-r--r--
test_codecencodings_cn.py	3.86 KB	-rw-r--r--
test_codecencodings_hk.py	701 B	-rw-r--r--
test_codecencodings_iso2022.py	3.65 KB	-rw-r--r--
test_codecencodings_jp.py	4.79 KB	-rw-r--r--
test_codecencodings_kr.py	2.96 KB	-rw-r--r--
test_codecencodings_tw.py	681 B	-rw-r--r--
test_codecmaps_cn.py	746 B	-rw-r--r--
test_codecmaps_hk.py	386 B	-rw-r--r--
test_codecmaps_jp.py	1.7 KB	-rw-r--r--
test_codecmaps_kr.py	1.16 KB	-rw-r--r--
test_codecmaps_tw.py	705 B	-rw-r--r--
test_codecs.py	136.12 KB	-rw-r--r--
test_codeop.py	8.68 KB	-rw-r--r--
test_collections.py	93.47 KB	-rw-r--r--
test_colorsys.py	4.27 KB	-rw-r--r--
test_compare.py	17.46 KB	-rw-r--r--
test_compile.py	78.68 KB	-rw-r--r--
test_compileall.py	48.27 KB	-rw-r--r--
test_compiler_assemble.py	2.46 KB	-rw-r--r--
test_compiler_codegen.py	1.69 KB	-rw-r--r--
test_complex.py	35.37 KB	-rw-r--r--
test_configparser.py	85.34 KB	-rw-r--r--
test_contains.py	3.35 KB	-rw-r--r--
test_context.py	30.78 KB	-rw-r--r--
test_contextlib.py	43.12 KB	-rw-r--r--
test_contextlib_async.py	23.99 KB	-rw-r--r--
test_copy.py	26.52 KB	-rw-r--r--
test_copyreg.py	4.36 KB	-rw-r--r--
test_coroutines.py	67.47 KB	-rw-r--r--
test_cprofile.py	7.36 KB	-rw-r--r--
test_crashers.py	1.17 KB	-rw-r--r--
test_crypt.py	4.19 KB	-rw-r--r--
test_csv.py	61.27 KB	-rw-r--r--
test_curses.py	49.54 KB	-rw-r--r--
test_datetime.py	2.53 KB	-rw-r--r--
test_dbm.py	6.83 KB	-rw-r--r--
test_dbm_dumb.py	11.08 KB	-rw-r--r--
test_dbm_gnu.py	7.24 KB	-rw-r--r--
test_dbm_ndbm.py	5.91 KB	-rw-r--r--
test_decimal.py	216.13 KB	-rw-r--r--
test_decorators.py	14.63 KB	-rw-r--r--
test_defaultdict.py	6.1 KB	-rw-r--r--
test_deque.py	33.16 KB	-rw-r--r--
test_descr.py	196.13 KB	-rw-r--r--
test_descrtut.py	10.98 KB	-rw-r--r--
test_devpoll.py	4.44 KB	-rw-r--r--
test_dict.py	50.92 KB	-rw-r--r--
test_dict_version.py	6.1 KB	-rw-r--r--
test_dictcomps.py	5.15 KB	-rw-r--r--
test_dictviews.py	14.82 KB	-rw-r--r--
test_difflib.py	21.47 KB	-rw-r--r--
test_difflib_expect.html	100.85 KB	-rw-r--r--
test_dis.py	83 KB	-rw-r--r--
test_docxmlrpc.py	9.1 KB	-rw-r--r--
test_dtrace.py	7.98 KB	-rw-r--r--
test_dynamic.py	6 KB	-rw-r--r--
test_dynamicclassattribute.py	9.57 KB	-rw-r--r--
test_eintr.py	627 B	-rw-r--r--
test_embed.py	69.41 KB	-rw-r--r--
test_ensurepip.py	11.49 KB	-rw-r--r--
test_enum.py	186.78 KB	-rw-r--r--
test_enumerate.py	9.14 KB	-rw-r--r--
test_eof.py	3.1 KB	-rw-r--r--
test_epoll.py	9.4 KB	-rw-r--r--
test_errno.py	1.04 KB	-rw-r--r--
test_except_star.py	38.25 KB	-rw-r--r--
test_exception_group.py	34.03 KB	-rw-r--r--
test_exception_hierarchy.py	7.54 KB	-rw-r--r--
test_exception_variations.py	13.74 KB	-rw-r--r--
test_exceptions.py	76.46 KB	-rw-r--r--
test_extcall.py	14.69 KB	-rw-r--r--
test_faulthandler.py	30.31 KB	-rw-r--r--
test_fcntl.py	7.76 KB	-rw-r--r--
test_file.py	11.78 KB	-rw-r--r--
test_file_eintr.py	10.74 KB	-rw-r--r--
test_filecmp.py	10.33 KB	-rw-r--r--
test_fileinput.py	37.85 KB	-rw-r--r--
test_fileio.py	19.98 KB	-rw-r--r--
test_fileutils.py	951 B	-rw-r--r--
test_finalization.py	14.66 KB	-rw-r--r--
test_float.py	64.76 KB	-rw-r--r--
test_flufl.py	1.53 KB	-rw-r--r--
test_fnmatch.py	10.68 KB	-rw-r--r--
test_fork1.py	3.3 KB	-rw-r--r--
test_format.py	28.44 KB	-rw-r--r--
test_fractions.py	52.53 KB	-rw-r--r--
test_frame.py	14.04 KB	-rw-r--r--
test_frozen.py	2.2 KB	-rw-r--r--
test_fstring.py	64.71 KB	-rw-r--r--
test_ftplib.py	41.94 KB	-rw-r--r--
test_funcattrs.py	15.57 KB	-rw-r--r--
test_functools.py	109.31 KB	-rw-r--r--
test_gc.py	47.71 KB	-rw-r--r--
test_generator_stop.py	943 B	-rw-r--r--
test_generators.py	66.13 KB	-rw-r--r--
test_genericalias.py	17.78 KB	-rw-r--r--
test_genericclass.py	9.44 KB	-rw-r--r--
test_genericpath.py	22.29 KB	-rw-r--r--
test_genexps.py	7.3 KB	-rw-r--r--
test_getopt.py	6.6 KB	-rw-r--r--
test_getpass.py	6.37 KB	-rw-r--r--
test_getpath.py	44.36 KB	-rw-r--r--
test_gettext.py	35.67 KB	-rw-r--r--
test_glob.py	17.19 KB	-rw-r--r--
test_global.py	1.2 KB	-rw-r--r--
test_grammar.py	65.97 KB	-rw-r--r--
test_graphlib.py	8.31 KB	-rw-r--r--
test_grp.py	3.67 KB	-rw-r--r--
test_gzip.py	40.94 KB	-rw-r--r--
test_hash.py	12.11 KB	-rw-r--r--
test_hashlib.py	46.71 KB	-rw-r--r--
test_heapq.py	16.42 KB	-rw-r--r--
test_hmac.py	26.06 KB	-rw-r--r--
test_html.py	4.23 KB	-rw-r--r--
test_htmlparser.py	33.37 KB	-rw-r--r--
test_http_cookiejar.py	81.57 KB	-rw-r--r--
test_http_cookies.py	18.7 KB	-rw-r--r--
test_httplib.py	96.14 KB	-rw-r--r--
test_httpservers.py	56.43 KB	-rw-r--r--
test_idle.py	831 B	-rw-r--r--
test_imaplib.py	41.69 KB	-rw-r--r--
test_imghdr.py	4.81 KB	-rw-r--r--
test_index.py	8.37 KB	-rw-r--r--
test_int.py	33.34 KB	-rw-r--r--
test_int_literal.py	6.89 KB	-rw-r--r--
test_interpreters.py	32.11 KB	-rw-r--r--
test_io.py	182.76 KB	-rw-r--r--
test_ioctl.py	3.24 KB	-rw-r--r--
test_ipaddress.py	119.17 KB	-rw-r--r--
test_isinstance.py	12.95 KB	-rw-r--r--
test_iter.py	36.77 KB	-rw-r--r--
test_iterlen.py	7.1 KB	-rw-r--r--
test_itertools.py	106.61 KB	-rw-r--r--
test_keyword.py	2 KB	-rw-r--r--
test_keywordonlyarg.py	6.89 KB	-rw-r--r--
test_kqueue.py	9.36 KB	-rw-r--r--
test_largefile.py	10.17 KB	-rw-r--r--
test_launcher.py	27.23 KB	-rw-r--r--
test_linecache.py	11.04 KB	-rw-r--r--
test_list.py	8.93 KB	-rw-r--r--
test_listcomps.py	20.71 KB	-rw-r--r--
test_lltrace.py	3.71 KB	-rw-r--r--
test_locale.py	24.43 KB	-rw-r--r--
test_logging.py	241.62 KB	-rw-r--r--
test_long.py	63.33 KB	-rw-r--r--
test_longexp.py	233 B	-rw-r--r--
test_lzma.py	92.65 KB	-rw-r--r--
test_mailbox.py	93.91 KB	-rw-r--r--
test_mailcap.py	11.48 KB	-rw-r--r--
test_marshal.py	23.15 KB	-rw-r--r--
test_math.py	107.6 KB	-rw-r--r--
test_math_property.py	1.15 KB	-rw-r--r--
test_memoryio.py	32.65 KB	-rw-r--r--
test_memoryview.py	21.76 KB	-rw-r--r--
test_metaclass.py	6.19 KB	-rw-r--r--
test_mimetypes.py	15.28 KB	-rw-r--r--
test_minidom.py	68.42 KB	-rw-r--r--
test_mmap.py	38.56 KB	-rw-r--r--
test_modulefinder.py	12.21 KB	-rw-r--r--
test_monitoring.py	55.76 KB	-rw-r--r--
test_msilib.py	5.52 KB	-rw-r--r--
test_multibytecodec.py	15.79 KB	-rw-r--r--
test_multiprocessing_main_hand...	11.48 KB	-rw-r--r--
test_named_expressions.py	29.62 KB	-rw-r--r--
test_netrc.py	11.86 KB	-rw-r--r--
test_nis.py	1.25 KB	-rw-r--r--
test_nntplib.py	62.7 KB	-rw-r--r--
test_ntpath.py	52.48 KB	-rw-r--r--
test_numeric_tower.py	8 KB	-rw-r--r--
test_opcache.py	10.89 KB	-rw-r--r--
test_opcodes.py	3.62 KB	-rw-r--r--
test_openpty.py	600 B	-rw-r--r--
test_operator.py	26.72 KB	-rw-r--r--
test_optparse.py	61.02 KB	-rw-r--r--
test_ordered_dict.py	35.62 KB	-rw-r--r--
test_os.py	179.95 KB	-rw-r--r--
test_ossaudiodev.py	7.27 KB	-rw-r--r--
test_osx_env.py	1.31 KB	-rw-r--r--
test_pathlib.py	137.81 KB	-rw-r--r--
test_patma.py	86.03 KB	-rw-r--r--
test_pdb.py	86.53 KB	-rw-r--r--
test_peepholer.py	40.6 KB	-rw-r--r--
test_pep646_syntax.py	7.79 KB	-rw-r--r--
test_perf_profiler.py	11.27 KB	-rw-r--r--
test_perfmaps.py	685 B	-rw-r--r--
test_pickle.py	20.75 KB	-rw-r--r--
test_picklebuffer.py	4.99 KB	-rw-r--r--
test_pickletools.py	4.13 KB	-rw-r--r--
test_pipes.py	6.79 KB	-rw-r--r--
test_pkg.py	9.59 KB	-rw-r--r--
test_pkgutil.py	22.36 KB	-rw-r--r--
test_platform.py	21.59 KB	-rw-r--r--
test_plistlib.py	41.25 KB	-rw-r--r--
test_poll.py	7.39 KB	-rw-r--r--
test_popen.py	2.11 KB	-rw-r--r--
test_poplib.py	17.05 KB	-rw-r--r--
test_positional_only_arg.py	18.44 KB	-rw-r--r--
test_posix.py	95.07 KB	-rw-r--r--
test_posixpath.py	33.75 KB	-rw-r--r--
test_pow.py	6.38 KB	-rw-r--r--
test_pprint.py	50.59 KB	-rw-r--r--
test_print.py	7.72 KB	-rw-r--r--
test_profile.py	8.69 KB	-rw-r--r--
test_property.py	18.03 KB	-rw-r--r--
test_pstats.py	4.31 KB	-rw-r--r--
test_pty.py	16.18 KB	-rw-r--r--
test_pulldom.py	12.33 KB	-rw-r--r--
test_pwd.py	4.32 KB	-rw-r--r--
test_py_compile.py	11.93 KB	-rw-r--r--
test_pyclbr.py	10.15 KB	-rw-r--r--
test_pyexpat.py	29.35 KB	-rw-r--r--
test_queue.py	20.61 KB	-rw-r--r--
test_quopri.py	7.87 KB	-rw-r--r--
test_raise.py	13.44 KB	-rw-r--r--
test_random.py	56.69 KB	-rw-r--r--
test_range.py	26.53 KB	-rw-r--r--
test_re.py	131.37 KB	-rw-r--r--
test_readline.py	12.76 KB	-rw-r--r--
test_regrtest.py	90.02 KB	-rw-r--r--
test_repl.py	4.99 KB	-rw-r--r--
test_reprlib.py	27.77 KB	-rw-r--r--
test_resource.py	7.12 KB	-rw-r--r--
test_richcmp.py	11.95 KB	-rw-r--r--
test_rlcompleter.py	7.4 KB	-rw-r--r--
test_robotparser.py	11.02 KB	-rw-r--r--
test_runpy.py	33.95 KB	-rw-r--r--
test_sax.py	54.63 KB	-rw-r--r--
test_sched.py	7.38 KB	-rw-r--r--
test_scope.py	21.21 KB	-rw-r--r--
test_script_helper.py	5.82 KB	-rw-r--r--
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Code Editor : test_peepholer.py

import dis
from itertools import combinations, product
import sys
import textwrap
import unittest

from test import support
from test.support.bytecode_helper import BytecodeTestCase, CfgOptimizationTestCase

def compile_pattern_with_fast_locals(pattern):
    source = textwrap.dedent(
        f"""
        def f(x):
            match x:
                case {pattern}:
                    pass
        """
    )
    namespace = {}
    exec(source, namespace)
    return namespace["f"].__code__

def count_instr_recursively(f, opname):
    count = 0
    for instr in dis.get_instructions(f):
        if instr.opname == opname:
            count += 1
    if hasattr(f, '__code__'):
        f = f.__code__
    for c in f.co_consts:
        if hasattr(c, 'co_code'):
            count += count_instr_recursively(c, opname)
    return count

class TestTranforms(BytecodeTestCase):

def check_jump_targets(self, code):
        instructions = list(dis.get_instructions(code))
        targets = {instr.offset: instr for instr in instructions}
        for instr in instructions:
            if 'JUMP_' not in instr.opname:
                continue
            tgt = targets[instr.argval]
            # jump to unconditional jump
            if tgt.opname in ('JUMP_BACKWARD', 'JUMP_FORWARD'):
                self.fail(f'{instr.opname} at {instr.offset} '
                          f'jumps to {tgt.opname} at {tgt.offset}')
            # unconditional jump to RETURN_VALUE
            if (instr.opname in ('JUMP_BACKWARD', 'JUMP_FORWARD') and
                tgt.opname == 'RETURN_VALUE'):
                self.fail(f'{instr.opname} at {instr.offset} '
                          f'jumps to {tgt.opname} at {tgt.offset}')

def check_lnotab(self, code):
        "Check that the lnotab byte offsets are sensible."
        code = dis._get_code_object(code)
        lnotab = list(dis.findlinestarts(code))
        # Don't bother checking if the line info is sensible, because
        # most of the line info we can get at comes from lnotab.
        min_bytecode = min(t[0] for t in lnotab)
        max_bytecode = max(t[0] for t in lnotab)
        self.assertGreaterEqual(min_bytecode, 0)
        self.assertLess(max_bytecode, len(code.co_code))
        # This could conceivably test more (and probably should, as there
        # aren't very many tests of lnotab), if peepholer wasn't scheduled
        # to be replaced anyway.

def test_unot(self):
        # UNARY_NOT POP_JUMP_IF_FALSE  -->  POP_JUMP_IF_TRUE'
        def unot(x):
            if not x == 2:
                del x
        self.assertNotInBytecode(unot, 'UNARY_NOT')
        self.assertNotInBytecode(unot, 'POP_JUMP_IF_FALSE')
        self.assertInBytecode(unot, 'POP_JUMP_IF_TRUE')
        self.check_lnotab(unot)

def test_elim_inversion_of_is_or_in(self):
        for line, cmp_op, invert in (
            ('not a is b', 'IS_OP', 1,),
            ('not a is not b', 'IS_OP', 0,),
            ('not a in b', 'CONTAINS_OP', 1,),
            ('not a not in b', 'CONTAINS_OP', 0,),
            ):
            with self.subTest(line=line):
                code = compile(line, '', 'single')
                self.assertInBytecode(code, cmp_op, invert)
                self.check_lnotab(code)

def test_global_as_constant(self):
        # LOAD_GLOBAL None/True/False  -->  LOAD_CONST None/True/False
        def f():
            x = None
            x = None
            return x
        def g():
            x = True
            return x
        def h():
            x = False
            return x

for func, elem in ((f, None), (g, True), (h, False)):
            with self.subTest(func=func):
                self.assertNotInBytecode(func, 'LOAD_GLOBAL')
                self.assertInBytecode(func, 'LOAD_CONST', elem)
                self.check_lnotab(func)

def f():
            'Adding a docstring made this test fail in Py2.5.0'
            return None

self.assertNotInBytecode(f, 'LOAD_GLOBAL')
        self.assertInBytecode(f, 'RETURN_CONST', None)
        self.check_lnotab(f)

def test_while_one(self):
        # Skip over:  LOAD_CONST trueconst  POP_JUMP_IF_FALSE xx
        def f():
            while 1:
                pass
            return list
        for elem in ('LOAD_CONST', 'POP_JUMP_IF_FALSE'):
            self.assertNotInBytecode(f, elem)
        for elem in ('JUMP_BACKWARD',):
            self.assertInBytecode(f, elem)
        self.check_lnotab(f)

def test_pack_unpack(self):
        for line, elem in (
            ('a, = a,', 'RETURN_CONST',),
            ('a, b = a, b', 'SWAP',),
            ('a, b, c = a, b, c', 'SWAP',),
            ):
            with self.subTest(line=line):
                code = compile(line,'','single')
                self.assertInBytecode(code, elem)
                self.assertNotInBytecode(code, 'BUILD_TUPLE')
                self.assertNotInBytecode(code, 'UNPACK_SEQUENCE')
                self.check_lnotab(code)

def test_folding_of_tuples_of_constants(self):
        for line, elem in (
            ('a = 1,2,3', (1, 2, 3)),
            ('("a","b","c")', ('a', 'b', 'c')),
            ('a,b,c = 1,2,3', (1, 2, 3)),
            ('(None, 1, None)', (None, 1, None)),
            ('((1, 2), 3, 4)', ((1, 2), 3, 4)),
            ):
            with self.subTest(line=line):
                code = compile(line,'','single')
                self.assertInBytecode(code, 'LOAD_CONST', elem)
                self.assertNotInBytecode(code, 'BUILD_TUPLE')
                self.check_lnotab(code)

# Long tuples should be folded too.
        code = compile(repr(tuple(range(10000))),'','single')
        self.assertNotInBytecode(code, 'BUILD_TUPLE')
        # One LOAD_CONST for the tuple, one for the None return value
        load_consts = [instr for instr in dis.get_instructions(code)
                              if instr.opname == 'LOAD_CONST']
        self.assertEqual(len(load_consts), 1)
        self.check_lnotab(code)

# Bug 1053819:  Tuple of constants misidentified when presented with:
        # . . . opcode_with_arg 100   unary_opcode   BUILD_TUPLE 1  . . .
        # The following would segfault upon compilation
        def crater():
            (~[
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
                0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
            ],)
        self.check_lnotab(crater)

def test_folding_of_lists_of_constants(self):
        for line, elem in (
            # in/not in constants with BUILD_LIST should be folded to a tuple:
            ('a in [1,2,3]', (1, 2, 3)),
            ('a not in ["a","b","c"]', ('a', 'b', 'c')),
            ('a in [None, 1, None]', (None, 1, None)),
            ('a not in [(1, 2), 3, 4]', ((1, 2), 3, 4)),
            ):
            with self.subTest(line=line):
                code = compile(line, '', 'single')
                self.assertInBytecode(code, 'LOAD_CONST', elem)
                self.assertNotInBytecode(code, 'BUILD_LIST')
                self.check_lnotab(code)

def test_folding_of_sets_of_constants(self):
        for line, elem in (
            # in/not in constants with BUILD_SET should be folded to a frozenset:
            ('a in {1,2,3}', frozenset({1, 2, 3})),
            ('a not in {"a","b","c"}', frozenset({'a', 'c', 'b'})),
            ('a in {None, 1, None}', frozenset({1, None})),
            ('a not in {(1, 2), 3, 4}', frozenset({(1, 2), 3, 4})),
            ('a in {1, 2, 3, 3, 2, 1}', frozenset({1, 2, 3})),
            ):
            with self.subTest(line=line):
                code = compile(line, '', 'single')
                self.assertNotInBytecode(code, 'BUILD_SET')
                self.assertInBytecode(code, 'LOAD_CONST', elem)
                self.check_lnotab(code)

# Ensure that the resulting code actually works:
        def f(a):
            return a in {1, 2, 3}

def g(a):
            return a not in {1, 2, 3}

self.assertTrue(f(3))
        self.assertTrue(not f(4))
        self.check_lnotab(f)

self.assertTrue(not g(3))
        self.assertTrue(g(4))
        self.check_lnotab(g)

def test_folding_of_binops_on_constants(self):
        for line, elem in (
            ('a = 2+3+4', 9),                   # chained fold
            ('"@"*4', '@@@@'),                  # check string ops
            ('a="abc" + "def"', 'abcdef'),      # check string ops
            ('a = 3**4', 81),                   # binary power
            ('a = 3*4', 12),                    # binary multiply
            ('a = 13//4', 3),                   # binary floor divide
            ('a = 14%4', 2),                    # binary modulo
            ('a = 2+3', 5),                     # binary add
            ('a = 13-4', 9),                    # binary subtract
            ('a = (12,13)[1]', 13),             # binary subscr
            ('a = 13 << 2', 52),                # binary lshift
            ('a = 13 >> 2', 3),                 # binary rshift
            ('a = 13 & 7', 5),                  # binary and
            ('a = 13 ^ 7', 10),                 # binary xor
            ('a = 13 | 7', 15),                 # binary or
            ):
            with self.subTest(line=line):
                code = compile(line, '', 'single')
                self.assertInBytecode(code, 'LOAD_CONST', elem)
                for instr in dis.get_instructions(code):
                    self.assertFalse(instr.opname.startswith('BINARY_'))
                self.check_lnotab(code)

# Verify that unfoldables are skipped
        code = compile('a=2+"b"', '', 'single')
        self.assertInBytecode(code, 'LOAD_CONST', 2)
        self.assertInBytecode(code, 'LOAD_CONST', 'b')
        self.check_lnotab(code)

# Verify that large sequences do not result from folding
        code = compile('a="x"*10000', '', 'single')
        self.assertInBytecode(code, 'LOAD_CONST', 10000)
        self.assertNotIn("x"*10000, code.co_consts)
        self.check_lnotab(code)
        code = compile('a=1<<1000', '', 'single')
        self.assertInBytecode(code, 'LOAD_CONST', 1000)
        self.assertNotIn(1<<1000, code.co_consts)
        self.check_lnotab(code)
        code = compile('a=2**1000', '', 'single')
        self.assertInBytecode(code, 'LOAD_CONST', 1000)
        self.assertNotIn(2**1000, code.co_consts)
        self.check_lnotab(code)

def test_binary_subscr_on_unicode(self):
        # valid code get optimized
        code = compile('"foo"[0]', '', 'single')
        self.assertInBytecode(code, 'LOAD_CONST', 'f')
        self.assertNotInBytecode(code, 'BINARY_SUBSCR')
        self.check_lnotab(code)
        code = compile('"\u0061\uffff"[1]', '', 'single')
        self.assertInBytecode(code, 'LOAD_CONST', '\uffff')
        self.assertNotInBytecode(code,'BINARY_SUBSCR')
        self.check_lnotab(code)

# With PEP 393, non-BMP char get optimized
        code = compile('"\U00012345"[0]', '', 'single')
        self.assertInBytecode(code, 'LOAD_CONST', '\U00012345')
        self.assertNotInBytecode(code, 'BINARY_SUBSCR')
        self.check_lnotab(code)

# invalid code doesn't get optimized
        # out of range
        code = compile('"fuu"[10]', '', 'single')
        self.assertInBytecode(code, 'BINARY_SUBSCR')
        self.check_lnotab(code)

def test_folding_of_unaryops_on_constants(self):
        for line, elem in (
            ('-0.5', -0.5),                     # unary negative
            ('-0.0', -0.0),                     # -0.0
            ('-(1.0-1.0)', -0.0),               # -0.0 after folding
            ('-0', 0),                          # -0
            ('~-2', 1),                         # unary invert
            ('+1', 1),                          # unary positive
        ):
            with self.subTest(line=line):
                code = compile(line, '', 'single')
                self.assertInBytecode(code, 'LOAD_CONST', elem)
                for instr in dis.get_instructions(code):
                    self.assertFalse(instr.opname.startswith('UNARY_'))
                self.check_lnotab(code)

# Check that -0.0 works after marshaling
        def negzero():
            return -(1.0-1.0)

for instr in dis.get_instructions(negzero):
            self.assertFalse(instr.opname.startswith('UNARY_'))
        self.check_lnotab(negzero)

# Verify that unfoldables are skipped
        for line, elem, opname in (
            ('-"abc"', 'abc', 'UNARY_NEGATIVE'),
            ('~"abc"', 'abc', 'UNARY_INVERT'),
        ):
            with self.subTest(line=line):
                code = compile(line, '', 'single')
                self.assertInBytecode(code, 'LOAD_CONST', elem)
                self.assertInBytecode(code, opname)
                self.check_lnotab(code)

def test_elim_extra_return(self):
        # RETURN LOAD_CONST None RETURN  -->  RETURN
        def f(x):
            return x
        self.assertNotInBytecode(f, 'LOAD_CONST', None)
        returns = [instr for instr in dis.get_instructions(f)
                          if instr.opname == 'RETURN_VALUE']
        self.assertEqual(len(returns), 1)
        self.check_lnotab(f)

def test_elim_jump_to_return(self):
        # JUMP_FORWARD to RETURN -->  RETURN
        def f(cond, true_value, false_value):
            # Intentionally use two-line expression to test issue37213.
            return (true_value if cond
                    else false_value)
        self.check_jump_targets(f)
        self.assertNotInBytecode(f, 'JUMP_FORWARD')
        self.assertNotInBytecode(f, 'JUMP_BACKWARD')
        returns = [instr for instr in dis.get_instructions(f)
                          if instr.opname == 'RETURN_VALUE']
        self.assertEqual(len(returns), 2)
        self.check_lnotab(f)

def test_elim_jump_to_uncond_jump(self):
        # POP_JUMP_IF_FALSE to JUMP_FORWARD --> POP_JUMP_IF_FALSE to non-jump
        def f():
            if a:
                # Intentionally use two-line expression to test issue37213.
                if (c
                    or d):
                    foo()
            else:
                baz()
        self.check_jump_targets(f)
        self.check_lnotab(f)

def test_elim_jump_to_uncond_jump2(self):
        # POP_JUMP_IF_FALSE to JUMP_BACKWARD --> POP_JUMP_IF_FALSE to non-jump
        def f():
            while a:
                # Intentionally use two-line expression to test issue37213.
                if (c
                    or d):
                    a = foo()
        self.check_jump_targets(f)
        self.check_lnotab(f)

def test_elim_jump_to_uncond_jump3(self):
        # Intentionally use two-line expressions to test issue37213.
        # POP_JUMP_IF_FALSE to POP_JUMP_IF_FALSE --> POP_JUMP_IF_FALSE to non-jump
        def f(a, b, c):
            return ((a and b)
                    and c)
        self.check_jump_targets(f)
        self.check_lnotab(f)
        self.assertEqual(count_instr_recursively(f, 'POP_JUMP_IF_FALSE'), 2)
        # POP_JUMP_IF_TRUE to POP_JUMP_IF_TRUE --> POP_JUMP_IF_TRUE to non-jump
        def f(a, b, c):
            return ((a or b)
                    or c)
        self.check_jump_targets(f)
        self.check_lnotab(f)
        self.assertEqual(count_instr_recursively(f, 'POP_JUMP_IF_TRUE'), 2)
        # JUMP_IF_FALSE_OR_POP to JUMP_IF_TRUE_OR_POP --> POP_JUMP_IF_FALSE to non-jump
        def f(a, b, c):
            return ((a and b)
                    or c)
        self.check_jump_targets(f)
        self.check_lnotab(f)
        self.assertEqual(count_instr_recursively(f, 'POP_JUMP_IF_FALSE'), 1)
        self.assertEqual(count_instr_recursively(f, 'POP_JUMP_IF_TRUE'), 1)
        # POP_JUMP_IF_TRUE to POP_JUMP_IF_FALSE --> POP_JUMP_IF_TRUE to non-jump
        def f(a, b, c):
            return ((a or b)
                    and c)
        self.check_jump_targets(f)
        self.check_lnotab(f)
        self.assertEqual(count_instr_recursively(f, 'POP_JUMP_IF_FALSE'), 1)
        self.assertEqual(count_instr_recursively(f, 'POP_JUMP_IF_TRUE'), 1)

def test_elim_jump_to_uncond_jump4(self):
        def f():
            for i in range(5):
                if i > 3:
                    print(i)
        self.check_jump_targets(f)

def test_elim_jump_after_return1(self):
        # Eliminate dead code: jumps immediately after returns can't be reached
        def f(cond1, cond2):
            if cond1: return 1
            if cond2: return 2
            while 1:
                return 3
            while 1:
                if cond1: return 4
                return 5
            return 6
        self.assertNotInBytecode(f, 'JUMP_FORWARD')
        self.assertNotInBytecode(f, 'JUMP_BACKWARD')
        returns = [instr for instr in dis.get_instructions(f)
                          if instr.opname == 'RETURN_VALUE']
        self.assertLessEqual(len(returns), 6)
        self.check_lnotab(f)

def test_make_function_doesnt_bail(self):
        def f():
            def g()->1+1:
                pass
            return g
        self.assertNotInBytecode(f, 'BINARY_OP')
        self.check_lnotab(f)

def test_constant_folding(self):
        # Issue #11244: aggressive constant folding.
        exprs = [
            '3 * -5',
            '-3 * 5',
            '2 * (3 * 4)',
            '(2 * 3) * 4',
            '(-1, 2, 3)',
            '(1, -2, 3)',
            '(1, 2, -3)',
            '(1, 2, -3) * 6',
            'lambda x: x in {(3 * -5) + (-1 - 6), (1, -2, 3) * 2, None}',
        ]
        for e in exprs:
            with self.subTest(e=e):
                code = compile(e, '', 'single')
                for instr in dis.get_instructions(code):
                    self.assertFalse(instr.opname.startswith('UNARY_'))
                    self.assertFalse(instr.opname.startswith('BINARY_'))
                    self.assertFalse(instr.opname.startswith('BUILD_'))
                self.check_lnotab(code)

def test_in_literal_list(self):
        def containtest():
            return x in [a, b]
        self.assertEqual(count_instr_recursively(containtest, 'BUILD_LIST'), 0)
        self.check_lnotab(containtest)

def test_iterate_literal_list(self):
        def forloop():
            for x in [a, b]:
                pass
        self.assertEqual(count_instr_recursively(forloop, 'BUILD_LIST'), 0)
        self.check_lnotab(forloop)

def test_condition_with_binop_with_bools(self):
        def f():
            if True or False:
                return 1
            return 0
        self.assertEqual(f(), 1)
        self.check_lnotab(f)

def test_if_with_if_expression(self):
        # Check bpo-37289
        def f(x):
            if (True if x else False):
                return True
            return False
        self.assertTrue(f(True))
        self.check_lnotab(f)

def test_trailing_nops(self):
        # Check the lnotab of a function that even after trivial
        # optimization has trailing nops, which the lnotab adjustment has to
        # handle properly (bpo-38115).
        def f(x):
            while 1:
                return 3
            while 1:
                return 5
            return 6
        self.check_lnotab(f)

def test_assignment_idiom_in_comprehensions(self):
        def listcomp():
            return [y for x in a for y in [f(x)]]
        self.assertEqual(count_instr_recursively(listcomp, 'FOR_ITER'), 1)
        def setcomp():
            return {y for x in a for y in [f(x)]}
        self.assertEqual(count_instr_recursively(setcomp, 'FOR_ITER'), 1)
        def dictcomp():
            return {y: y for x in a for y in [f(x)]}
        self.assertEqual(count_instr_recursively(dictcomp, 'FOR_ITER'), 1)
        def genexpr():
            return (y for x in a for y in [f(x)])
        self.assertEqual(count_instr_recursively(genexpr, 'FOR_ITER'), 1)

@support.requires_resource('cpu')
    def test_format_combinations(self):
        flags = '-+ #0'
        testcases = [
            *product(('', '1234', 'абвг'), 'sra'),
            *product((1234, -1234), 'duioxX'),
            *product((1234.5678901, -1234.5678901), 'duifegFEG'),
            *product((float('inf'), -float('inf')), 'fegFEG'),
        ]
        width_precs = [
            *product(('', '1', '30'), ('', '.', '.0', '.2')),
            ('', '.40'),
            ('30', '.40'),
        ]
        for value, suffix in testcases:
            for width, prec in width_precs:
                for r in range(len(flags) + 1):
                    for spec in combinations(flags, r):
                        fmt = '%' + ''.join(spec) + width + prec + suffix
                        with self.subTest(fmt=fmt, value=value):
                            s1 = fmt % value
                            s2 = eval(f'{fmt!r} % (x,)', {'x': value})
                            self.assertEqual(s2, s1, f'{fmt = }')

def test_format_misc(self):
        def format(fmt, *values):
            vars = [f'x{i+1}' for i in range(len(values))]
            if len(vars) == 1:
                args = '(' + vars[0] + ',)'
            else:
                args = '(' + ', '.join(vars) + ')'
            return eval(f'{fmt!r} % {args}', dict(zip(vars, values)))

self.assertEqual(format('string'), 'string')
        self.assertEqual(format('x = %s!', 1234), 'x = 1234!')
        self.assertEqual(format('x = %d!', 1234), 'x = 1234!')
        self.assertEqual(format('x = %x!', 1234), 'x = 4d2!')
        self.assertEqual(format('x = %f!', 1234), 'x = 1234.000000!')
        self.assertEqual(format('x = %s!', 1234.5678901), 'x = 1234.5678901!')
        self.assertEqual(format('x = %f!', 1234.5678901), 'x = 1234.567890!')
        self.assertEqual(format('x = %d!', 1234.5678901), 'x = 1234!')
        self.assertEqual(format('x = %s%% %%%%', 1234), 'x = 1234% %%')
        self.assertEqual(format('x = %s!', '%% %s'), 'x = %% %s!')
        self.assertEqual(format('x = %s, y = %d', 12, 34), 'x = 12, y = 34')

def test_format_errors(self):
        with self.assertRaisesRegex(TypeError,
                    'not enough arguments for format string'):
            eval("'%s' % ()")
        with self.assertRaisesRegex(TypeError,
                    'not all arguments converted during string formatting'):
            eval("'%s' % (x, y)", {'x': 1, 'y': 2})
        with self.assertRaisesRegex(ValueError, 'incomplete format'):
            eval("'%s%' % (x,)", {'x': 1234})
        with self.assertRaisesRegex(ValueError, 'incomplete format'):
            eval("'%s%%%' % (x,)", {'x': 1234})
        with self.assertRaisesRegex(TypeError,
                    'not enough arguments for format string'):
            eval("'%s%z' % (x,)", {'x': 1234})
        with self.assertRaisesRegex(ValueError, 'unsupported format character'):
            eval("'%s%z' % (x, 5)", {'x': 1234})
        with self.assertRaisesRegex(TypeError, 'a real number is required, not str'):
            eval("'%d' % (x,)", {'x': '1234'})
        with self.assertRaisesRegex(TypeError, 'an integer is required, not float'):
            eval("'%x' % (x,)", {'x': 1234.56})
        with self.assertRaisesRegex(TypeError, 'an integer is required, not str'):
            eval("'%x' % (x,)", {'x': '1234'})
        with self.assertRaisesRegex(TypeError, 'must be real number, not str'):
            eval("'%f' % (x,)", {'x': '1234'})
        with self.assertRaisesRegex(TypeError,
                    'not enough arguments for format string'):
            eval("'%s, %s' % (x, *y)", {'x': 1, 'y': []})
        with self.assertRaisesRegex(TypeError,
                    'not all arguments converted during string formatting'):
            eval("'%s, %s' % (x, *y)", {'x': 1, 'y': [2, 3]})

def test_static_swaps_unpack_two(self):
        def f(a, b):
            a, b = a, b
            b, a = a, b
        self.assertNotInBytecode(f, "SWAP")

def test_static_swaps_unpack_three(self):
        def f(a, b, c):
            a, b, c = a, b, c
            a, c, b = a, b, c
            b, a, c = a, b, c
            b, c, a = a, b, c
            c, a, b = a, b, c
            c, b, a = a, b, c
        self.assertNotInBytecode(f, "SWAP")

def test_static_swaps_match_mapping(self):
        for a, b, c in product("_a", "_b", "_c"):
            pattern = f"{{'a': {a}, 'b': {b}, 'c': {c}}}"
            with self.subTest(pattern):
                code = compile_pattern_with_fast_locals(pattern)
                self.assertNotInBytecode(code, "SWAP")

def test_static_swaps_match_class(self):
        forms = [
            "C({}, {}, {})",
            "C({}, {}, c={})",
            "C({}, b={}, c={})",
            "C(a={}, b={}, c={})"
        ]
        for a, b, c in product("_a", "_b", "_c"):
            for form in forms:
                pattern = form.format(a, b, c)
                with self.subTest(pattern):
                    code = compile_pattern_with_fast_locals(pattern)
                    self.assertNotInBytecode(code, "SWAP")

def test_static_swaps_match_sequence(self):
        swaps = {"*_, b, c", "a, *_, c", "a, b, *_"}
        forms = ["{}, {}, {}", "{}, {}, *{}", "{}, *{}, {}", "*{}, {}, {}"]
        for a, b, c in product("_a", "_b", "_c"):
            for form in forms:
                pattern = form.format(a, b, c)
                with self.subTest(pattern):
                    code = compile_pattern_with_fast_locals(pattern)
                    if pattern in swaps:
                        # If this fails... great! Remove this pattern from swaps
                        # to prevent regressing on any improvement:
                        self.assertInBytecode(code, "SWAP")
                    else:
                        self.assertNotInBytecode(code, "SWAP")

class TestBuglets(unittest.TestCase):

def test_bug_11510(self):
        # folded constant set optimization was commingled with the tuple
        # unpacking optimization which would fail if the set had duplicate
        # elements so that the set length was unexpected
        def f():
            x, y = {1, 1}
            return x, y
        with self.assertRaises(ValueError):
            f()

def test_bpo_42057(self):
        for i in range(10):
            try:
                raise Exception
            except Exception or Exception:
                pass

def test_bpo_45773_pop_jump_if_true(self):
        compile("while True or spam: pass", "<test>", "exec")

def test_bpo_45773_pop_jump_if_false(self):
        compile("while True or not spam: pass", "<test>", "exec")

class TestMarkingVariablesAsUnKnown(BytecodeTestCase):

def setUp(self):
        self.addCleanup(sys.settrace, sys.gettrace())
        sys.settrace(None)

def test_load_fast_known_simple(self):
        def f():
            x = 1
            y = x + x
        self.assertInBytecode(f, 'LOAD_FAST')

def test_load_fast_unknown_simple(self):
        def f():
            if condition():
                x = 1
            print(x)
        self.assertInBytecode(f, 'LOAD_FAST_CHECK')
        self.assertNotInBytecode(f, 'LOAD_FAST')

def test_load_fast_unknown_because_del(self):
        def f():
            x = 1
            del x
            print(x)
        self.assertInBytecode(f, 'LOAD_FAST_CHECK')
        self.assertNotInBytecode(f, 'LOAD_FAST')

def test_load_fast_known_because_parameter(self):
        def f1(x):
            print(x)
        self.assertInBytecode(f1, 'LOAD_FAST')
        self.assertNotInBytecode(f1, 'LOAD_FAST_CHECK')

def f2(*, x):
            print(x)
        self.assertInBytecode(f2, 'LOAD_FAST')
        self.assertNotInBytecode(f2, 'LOAD_FAST_CHECK')

def f3(*args):
            print(args)
        self.assertInBytecode(f3, 'LOAD_FAST')
        self.assertNotInBytecode(f3, 'LOAD_FAST_CHECK')

def f4(**kwargs):
            print(kwargs)
        self.assertInBytecode(f4, 'LOAD_FAST')
        self.assertNotInBytecode(f4, 'LOAD_FAST_CHECK')

def f5(x=0):
            print(x)
        self.assertInBytecode(f5, 'LOAD_FAST')
        self.assertNotInBytecode(f5, 'LOAD_FAST_CHECK')

def test_load_fast_known_because_already_loaded(self):
        def f():
            if condition():
                x = 1
            print(x)
            print(x)
        self.assertInBytecode(f, 'LOAD_FAST_CHECK')
        self.assertInBytecode(f, 'LOAD_FAST')

def test_load_fast_known_multiple_branches(self):
        def f():
            if condition():
                x = 1
            else:
                x = 2
            print(x)
        self.assertInBytecode(f, 'LOAD_FAST')
        self.assertNotInBytecode(f, 'LOAD_FAST_CHECK')

def test_load_fast_unknown_after_error(self):
        def f():
            try:
                res = 1 / 0
            except ZeroDivisionError:
                pass
            return res
        # LOAD_FAST (known) still occurs in the no-exception branch.
        # Assert that it doesn't occur in the LOAD_FAST_CHECK branch.
        self.assertInBytecode(f, 'LOAD_FAST_CHECK')

def test_load_fast_unknown_after_error_2(self):
        def f():
            try:
                1 / 0
            except:
                print(a, b, c, d, e, f, g)
            a = b = c = d = e = f = g = 1
        self.assertInBytecode(f, 'LOAD_FAST_CHECK')
        self.assertNotInBytecode(f, 'LOAD_FAST')

def test_load_fast_too_many_locals(self):
        # When there get to be too many locals to analyze completely,
        # later locals are all converted to LOAD_FAST_CHECK, except
        # when a store or prior load occurred in the same basicblock.
        def f():
            a00 = a01 = a02 = a03 = a04 = a05 = a06 = a07 = a08 = a09 = 1
            a10 = a11 = a12 = a13 = a14 = a15 = a16 = a17 = a18 = a19 = 1
            a20 = a21 = a22 = a23 = a24 = a25 = a26 = a27 = a28 = a29 = 1
            a30 = a31 = a32 = a33 = a34 = a35 = a36 = a37 = a38 = a39 = 1
            a40 = a41 = a42 = a43 = a44 = a45 = a46 = a47 = a48 = a49 = 1
            a50 = a51 = a52 = a53 = a54 = a55 = a56 = a57 = a58 = a59 = 1
            a60 = a61 = a62 = a63 = a64 = a65 = a66 = a67 = a68 = a69 = 1
            a70 = a71 = a72 = a73 = a74 = a75 = a76 = a77 = a78 = a79 = 1
            del a72, a73
            print(a73)
            print(a70, a71, a72, a73)
            while True:
                print(a00, a01, a62, a63)
                print(a64, a65, a78, a79)

for i in 0, 1, 62, 63:
            # First 64 locals: analyze completely
            self.assertInBytecode(f, 'LOAD_FAST', f"a{i:02}")
            self.assertNotInBytecode(f, 'LOAD_FAST_CHECK', f"a{i:02}")
        for i in 64, 65, 78, 79:
            # Locals >=64 not in the same basicblock
            self.assertInBytecode(f, 'LOAD_FAST_CHECK', f"a{i:02}")
            self.assertNotInBytecode(f, 'LOAD_FAST', f"a{i:02}")
        for i in 70, 71:
            # Locals >=64 in the same basicblock
            self.assertInBytecode(f, 'LOAD_FAST', f"a{i:02}")
            self.assertNotInBytecode(f, 'LOAD_FAST_CHECK', f"a{i:02}")
        # del statements should invalidate within basicblocks.
        self.assertInBytecode(f, 'LOAD_FAST_CHECK', "a72")
        self.assertNotInBytecode(f, 'LOAD_FAST', "a72")
        # previous checked loads within a basicblock enable unchecked loads
        self.assertInBytecode(f, 'LOAD_FAST_CHECK', "a73")
        self.assertInBytecode(f, 'LOAD_FAST', "a73")

def test_setting_lineno_no_undefined(self):
        code = textwrap.dedent("""\
            def f():
                x = y = 2
                if not x:
                    return 4
                for i in range(55):
                    x + 6
                L = 7
                L = 8
                L = 9
                L = 10
        """)
        ns = {}
        exec(code, ns)
        f = ns['f']
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        co_code = f.__code__.co_code
        def trace(frame, event, arg):
            if event == 'line' and frame.f_lineno == 9:
                frame.f_lineno = 3
                sys.settrace(None)
                return None
            return trace
        sys.settrace(trace)
        result = f()
        self.assertIsNone(result)
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        self.assertEqual(f.__code__.co_code, co_code)

def test_setting_lineno_one_undefined(self):
        code = textwrap.dedent("""\
            def f():
                x = y = 2
                if not x:
                    return 4
                for i in range(55):
                    x + 6
                del x
                L = 8
                L = 9
                L = 10
        """)
        ns = {}
        exec(code, ns)
        f = ns['f']
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        co_code = f.__code__.co_code
        def trace(frame, event, arg):
            if event == 'line' and frame.f_lineno == 9:
                frame.f_lineno = 3
                sys.settrace(None)
                return None
            return trace
        e = r"assigning None to 1 unbound local"
        with self.assertWarnsRegex(RuntimeWarning, e):
            sys.settrace(trace)
            result = f()
        self.assertEqual(result, 4)
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        self.assertEqual(f.__code__.co_code, co_code)

def test_setting_lineno_two_undefined(self):
        code = textwrap.dedent("""\
            def f():
                x = y = 2
                if not x:
                    return 4
                for i in range(55):
                    x + 6
                del x, y
                L = 8
                L = 9
                L = 10
        """)
        ns = {}
        exec(code, ns)
        f = ns['f']
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        co_code = f.__code__.co_code
        def trace(frame, event, arg):
            if event == 'line' and frame.f_lineno == 9:
                frame.f_lineno = 3
                sys.settrace(None)
                return None
            return trace
        e = r"assigning None to 2 unbound locals"
        with self.assertWarnsRegex(RuntimeWarning, e):
            sys.settrace(trace)
            result = f()
        self.assertEqual(result, 4)
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        self.assertEqual(f.__code__.co_code, co_code)

def make_function_with_no_checks(self):
        code = textwrap.dedent("""\
            def f():
                x = 2
                L = 3
                L = 4
                L = 5
                if not L:
                    x + 7
                    y = 2
        """)
        ns = {}
        exec(code, ns)
        f = ns['f']
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        return f

def test_deleting_local_warns_and_assigns_none(self):
        f = self.make_function_with_no_checks()
        co_code = f.__code__.co_code
        def trace(frame, event, arg):
            if event == 'line' and frame.f_lineno == 4:
                del frame.f_locals["x"]
                sys.settrace(None)
                return None
            return trace
        e = r"assigning None to unbound local 'x'"
        with self.assertWarnsRegex(RuntimeWarning, e):
            sys.settrace(trace)
            f()
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")
        self.assertEqual(f.__code__.co_code, co_code)

def test_modifying_local_does_not_add_check(self):
        f = self.make_function_with_no_checks()
        def trace(frame, event, arg):
            if event == 'line' and frame.f_lineno == 4:
                frame.f_locals["x"] = 42
                sys.settrace(None)
                return None
            return trace
        sys.settrace(trace)
        f()
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")

def test_initializing_local_does_not_add_check(self):
        f = self.make_function_with_no_checks()
        def trace(frame, event, arg):
            if event == 'line' and frame.f_lineno == 4:
                frame.f_locals["y"] = 42
                sys.settrace(None)
                return None
            return trace
        sys.settrace(trace)
        f()
        self.assertInBytecode(f, "LOAD_FAST")
        self.assertNotInBytecode(f, "LOAD_FAST_CHECK")

class DirectCfgOptimizerTests(CfgOptimizationTestCase):

def cfg_optimization_test(self, insts, expected_insts,
                              consts=None, expected_consts=None,
                              nlocals=0):
        if expected_consts is None:
            expected_consts = consts
        opt_insts, opt_consts = self.get_optimized(insts, consts, nlocals)
        expected_insts = self.normalize_insts(expected_insts)
        self.assertInstructionsMatch(opt_insts, expected_insts)
        self.assertEqual(opt_consts, expected_consts)

def test_conditional_jump_forward_non_const_condition(self):
        insts = [
            ('LOAD_NAME', 1, 11),
            ('POP_JUMP_IF_TRUE', lbl := self.Label(), 12),
            ('LOAD_CONST', 2, 13),
            lbl,
            ('LOAD_CONST', 3, 14),
            ('RETURN_VALUE', 14),
        ]
        expected_insts = [
            ('LOAD_NAME', 1, 11),
            ('POP_JUMP_IF_TRUE', lbl := self.Label(), 12),
            ('LOAD_CONST', 1, 13),
            lbl,
            ('RETURN_CONST', 2, 14),
        ]
        self.cfg_optimization_test(insts,
                                   expected_insts,
                                   consts=[0, 1, 2, 3, 4],
                                   expected_consts=[0, 2, 3])

def test_conditional_jump_forward_const_condition(self):
        # The unreachable branch of the jump is removed, the jump
        # becomes redundant and is replaced by a NOP (for the lineno)

insts = [
            ('LOAD_CONST', 3, 11),
            ('POP_JUMP_IF_TRUE', lbl := self.Label(), 12),
            ('LOAD_CONST', 2, 13),
            lbl,
            ('LOAD_CONST', 3, 14),
            ('RETURN_VALUE', 14),
        ]
        expected_insts = [
            ('NOP', 11),
            ('NOP', 12),
            ('RETURN_CONST', 1, 14),
        ]
        self.cfg_optimization_test(insts,
                                   expected_insts,
                                   consts=[0, 1, 2, 3, 4],
                                   expected_consts=[0, 3])

def test_conditional_jump_backward_non_const_condition(self):
        insts = [
            lbl1 := self.Label(),
            ('LOAD_NAME', 1, 11),
            ('POP_JUMP_IF_TRUE', lbl1, 12),
            ('LOAD_NAME', 2, 13),
            ('RETURN_VALUE', 13),
        ]
        expected = [
            lbl := self.Label(),
            ('LOAD_NAME', 1, 11),
            ('POP_JUMP_IF_TRUE', lbl, 12),
            ('LOAD_NAME', 2, 13),
            ('RETURN_VALUE', 13),
        ]
        self.cfg_optimization_test(insts, expected, consts=list(range(5)))

def test_conditional_jump_backward_const_condition(self):
        # The unreachable branch of the jump is removed
        insts = [
            lbl1 := self.Label(),
            ('LOAD_CONST', 3, 11),
            ('POP_JUMP_IF_TRUE', lbl1, 12),
            ('LOAD_CONST', 2, 13),
            ('RETURN_VALUE', 13),
        ]
        expected_insts = [
            lbl := self.Label(),
            ('NOP', 11),
            ('JUMP', lbl, 12),
        ]
        self.cfg_optimization_test(insts, expected_insts, consts=list(range(5)))

def test_no_unsafe_static_swap(self):
        # We can't change order of two stores to the same location
        insts = [
            ('LOAD_CONST', 0, 1),
            ('LOAD_CONST', 1, 2),
            ('LOAD_CONST', 2, 3),
            ('SWAP', 3, 4),
            ('STORE_FAST', 1, 4),
            ('STORE_FAST', 1, 4),
            ('POP_TOP', 0, 4),
            ('RETURN_VALUE', 5)
        ]
        self.cfg_optimization_test(insts, insts, consts=list(range(3)), nlocals=1)

def test_only_one_push_null_per_load_global(self):
        # When optimizing func()(), a second pass shouldn't
        # let the LOAD_GLOBAL absorb another PUSH_NULL.
        before = [
            ('PUSH_NULL', 0, 1),
            ('PUSH_NULL', 0, 1),
            ('LOAD_GLOBAL', 0, 1),
            ('CALL', 0, 1),
            ('CALL', 0, 1),
            ('RETURN_VALUE', 0, 1),
        ]
        after = [
            ('PUSH_NULL', 0, 1),
            ('LOAD_GLOBAL', 1, 1),
            ('CALL', 0, 1),
            ('CALL', 0, 1),
            ('RETURN_VALUE', 0, 1),
        ]
        self.cfg_optimization_test(before, expected_insts=after, consts=[])
        self.cfg_optimization_test(after, expected_insts=after, consts=[])

if __name__ == "__main__":
    unittest.main()

${this.title}

Code Editor : test_peepholer.py