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Name	Size	Permission
__pycache__	[ DIR ]	drwxrwxrwx
audiodata	[ DIR ]	drwxrwxrwx
capath	[ DIR ]	drwxrwxrwx
cjkencodings	[ DIR ]	drwxrwxrwx
crashers	[ DIR ]	drwxrwxrwx
data	[ DIR ]	drwxrwxrwx
decimaltestdata	[ DIR ]	drwxrwxrwx
dtracedata	[ DIR ]	drwxrwxrwx
encoded_modules	[ DIR ]	drwxrwxrwx
imghdrdata	[ DIR ]	drwxrwxrwx
leakers	[ DIR ]	drwxrwxrwx
libregrtest	[ DIR ]	drwxrwxrwx
sndhdrdata	[ DIR ]	drwxrwxrwx
subprocessdata	[ DIR ]	drwxrwxrwx
support	[ DIR ]	drwxrwxrwx
test_asyncio	[ DIR ]	drwxrwxrwx
test_email	[ DIR ]	drwxrwxrwx
test_import	[ DIR ]	drwxrwxrwx
test_importlib	[ DIR ]	drwxrwxrwx
test_json	[ DIR ]	drwxrwxrwx
test_peg_generator	[ DIR ]	drwxrwxrwx
test_tools	[ DIR ]	drwxrwxrwx
test_warnings	[ DIR ]	drwxrwxrwx
test_zoneinfo	[ DIR ]	drwxrwxrwx
tracedmodules	[ DIR ]	drwxrwxrwx
xmltestdata	[ DIR ]	drwxrwxrwx
ziptestdata	[ DIR ]	drwxrwxrwx
Sine-1000Hz-300ms.aif	60.25 KB	-rw-rw-rw-
__init__.py	48 B	-rw-rw-rw-
__main__.py	43 B	-rw-rw-rw-
_test_atexit.py	3.75 KB	-rw-rw-rw-
_test_eintr.py	18.17 KB	-rw-rw-rw-
_test_embed_set_config.py	8.81 KB	-rw-rw-rw-
_test_multiprocessing.py	199.1 KB	-rw-rw-rw-
_typed_dict_helper.py	512 B	-rw-rw-rw-
allsans.pem	10.03 KB	-rw-rw-rw-
ann_module.py	1.15 KB	-rw-rw-rw-
ann_module2.py	555 B	-rw-rw-rw-
ann_module3.py	466 B	-rw-rw-rw-
ann_module4.py	86 B	-rw-rw-rw-
ann_module5.py	212 B	-rw-rw-rw-
ann_module6.py	145 B	-rw-rw-rw-
ann_module7.py	306 B	-rw-rw-rw-
audiotest.au	27.48 KB	-rw-rw-rw-
audiotests.py	12.46 KB	-rw-rw-rw-
audit-tests.py	11.09 KB	-rw-rw-rw-
autotest.py	214 B	-rw-rw-rw-
bad_coding.py	25 B	-rw-rw-rw-
bad_coding2.py	32 B	-rw-rw-rw-
bad_getattr.py	65 B	-rw-rw-rw-
bad_getattr2.py	84 B	-rw-rw-rw-
bad_getattr3.py	144 B	-rw-rw-rw-
badcert.pem	1.92 KB	-rw-rw-rw-
badkey.pem	2.15 KB	-rw-rw-rw-
badsyntax_3131.py	34 B	-rw-rw-rw-
badsyntax_future10.py	98 B	-rw-rw-rw-
badsyntax_future3.py	182 B	-rw-rw-rw-
badsyntax_future4.py	163 B	-rw-rw-rw-
badsyntax_future5.py	196 B	-rw-rw-rw-
badsyntax_future6.py	171 B	-rw-rw-rw-
badsyntax_future7.py	207 B	-rw-rw-rw-
badsyntax_future8.py	132 B	-rw-rw-rw-
badsyntax_future9.py	152 B	-rw-rw-rw-
badsyntax_pep3120.py	15 B	-rw-rw-rw-
bisect_cmd.py	5.39 KB	-rw-rw-rw-
cfgparser.1	70 B	-rw-rw-rw-
cfgparser.2	19.54 KB	-rw-rw-rw-
cfgparser.3	1.62 KB	-rw-rw-rw-
clinic.test	97.34 KB	-rw-rw-rw-
cmath_testcases.txt	143.5 KB	-rw-rw-rw-
coding20731.py	22 B	-rw-rw-rw-
curses_tests.py	1.26 KB	-rw-rw-rw-
dataclass_module_1.py	869 B	-rw-rw-rw-
dataclass_module_1_str.py	867 B	-rw-rw-rw-
dataclass_module_2.py	788 B	-rw-rw-rw-
dataclass_module_2_str.py	786 B	-rw-rw-rw-
dataclass_textanno.py	138 B	-rw-rw-rw-
datetimetester.py	251.38 KB	-rw-rw-rw-
dis_module.py	81 B	-rw-rw-rw-
doctest_aliases.py	253 B	-rw-rw-rw-
doctest_lineno.py	964 B	-rw-rw-rw-
double_const.py	1.21 KB	-rw-rw-rw-
empty.vbs	70 B	-rw-rw-rw-
exception_hierarchy.txt	1.87 KB	-rw-rw-rw-
ffdh3072.pem	2.2 KB	-rw-rw-rw-
final_a.py	430 B	-rw-rw-rw-
final_b.py	430 B	-rw-rw-rw-
floating_points.txt	16.92 KB	-rw-rw-rw-
fork_wait.py	2.31 KB	-rw-rw-rw-
formatfloat_testcases.txt	7.8 KB	-rw-rw-rw-
future_test1.py	240 B	-rw-rw-rw-
future_test2.py	159 B	-rw-rw-rw-
gdb_sample.py	165 B	-rw-rw-rw-
good_getattr.py	209 B	-rw-rw-rw-
idnsans.pem	9.88 KB	-rw-rw-rw-
ieee754.txt	3.39 KB	-rw-rw-rw-
imp_dummy.py	66 B	-rw-rw-rw-
inspect_fodder.py	1.99 KB	-rw-rw-rw-
inspect_fodder2.py	3.64 KB	-rw-rw-rw-
inspect_stock_annotations.py	537 B	-rw-rw-rw-
inspect_stringized_annotations...	646 B	-rw-rw-rw-
inspect_stringized_annotations...	63 B	-rw-rw-rw-
keycert.passwd.pem	4.19 KB	-rw-rw-rw-
keycert.pem	4.03 KB	-rw-rw-rw-
keycert2.pem	4.05 KB	-rw-rw-rw-
keycert3.pem	9.39 KB	-rw-rw-rw-
keycert4.pem	9.4 KB	-rw-rw-rw-
keycertecc.pem	5.61 KB	-rw-rw-rw-
list_tests.py	17.2 KB	-rw-rw-rw-
lock_tests.py	31.14 KB	-rw-rw-rw-
mailcap.txt	1.28 KB	-rw-rw-rw-
make_ssl_certs.py	9.55 KB	-rw-rw-rw-
mapping_tests.py	22.49 KB	-rw-rw-rw-
math_testcases.txt	23.8 KB	-rw-rw-rw-
memory_watchdog.py	887 B	-rw-rw-rw-
mime.types	48.78 KB	-rw-rw-rw-
mock_socket.py	3.86 KB	-rw-rw-rw-
mod_generics_cache.py	1.18 KB	-rw-rw-rw-
mp_fork_bomb.py	466 B	-rw-rw-rw-
mp_preload.py	369 B	-rw-rw-rw-
multibytecodec_support.py	14.56 KB	-rw-rw-rw-
nokia.pem	1.91 KB	-rw-rw-rw-
nosan.pem	7.67 KB	-rw-rw-rw-
nullbytecert.pem	5.4 KB	-rw-rw-rw-
nullcert.pem	0 B	-rw-rw-rw-
pickletester.py	142.98 KB	-rw-rw-rw-
profilee.py	3.08 KB	-rw-rw-rw-
pstats.pck	65.05 KB	-rw-rw-rw-
pycacert.pem	5.63 KB	-rw-rw-rw-
pycakey.pem	2.46 KB	-rw-rw-rw-
pyclbr_input.py	681 B	-rw-rw-rw-
pydoc_mod.py	1010 B	-rw-rw-rw-
pydocfodder.py	6.39 KB	-rw-rw-rw-
pythoninfo.py	24.41 KB	-rw-rw-rw-
randv2_32.pck	7.34 KB	-rw-rw-rw-
randv2_64.pck	7.19 KB	-rw-rw-rw-
randv3.pck	7.82 KB	-rw-rw-rw-
re_tests.py	26.48 KB	-rw-rw-rw-
recursion.tar	516 B	-rw-rw-rw-
regrtest.py	1.31 KB	-rw-rw-rw-
relimport.py	28 B	-rw-rw-rw-
reperf.py	561 B	-rw-rw-rw-
revocation.crl	814 B	-rw-rw-rw-
sample_doctest.py	1.09 KB	-rw-rw-rw-
sample_doctest_no_docstrings.p...	239 B	-rw-rw-rw-
sample_doctest_no_doctests.py	284 B	-rw-rw-rw-
secp384r1.pem	263 B	-rw-rw-rw-
selfsigned_pythontestdotnet.pe...	2.11 KB	-rw-rw-rw-
seq_tests.py	15.29 KB	-rw-rw-rw-
sgml_input.html	8.31 KB	-rw-rw-rw-
signalinterproctester.py	2.82 KB	-rw-rw-rw-
sortperf.py	4.86 KB	-rw-rw-rw-
ssl_cert.pem	1.56 KB	-rw-rw-rw-
ssl_key.passwd.pem	2.63 KB	-rw-rw-rw-
ssl_key.pem	2.47 KB	-rw-rw-rw-
ssl_servers.py	7.31 KB	-rw-rw-rw-
ssltests.py	1.06 KB	-rw-rw-rw-
string_tests.py	69.47 KB	-rw-rw-rw-
talos-2019-0758.pem	1.32 KB	-rw-rw-rw-
test___all__.py	4.66 KB	-rw-rw-rw-
test___future__.py	2.42 KB	-rw-rw-rw-
test__locale.py	8.02 KB	-rw-rw-rw-
test__opcode.py	3.11 KB	-rw-rw-rw-
test__osx_support.py	13.96 KB	-rw-rw-rw-
test__xxsubinterpreters.py	81.21 KB	-rw-rw-rw-
test_abc.py	23.85 KB	-rw-rw-rw-
test_abstract_numbers.py	1.54 KB	-rw-rw-rw-
test_aifc.py	18.2 KB	-rw-rw-rw-
test_argparse.py	185.85 KB	-rw-rw-rw-
test_array.py	56.79 KB	-rw-rw-rw-
test_asdl_parser.py	4.57 KB	-rw-rw-rw-
test_ast.py	107.34 KB	-rw-rw-rw-
test_asyncgen.py	48.43 KB	-rw-rw-rw-
test_asynchat.py	9.68 KB	-rw-rw-rw-
test_asyncore.py	26.95 KB	-rw-rw-rw-
test_atexit.py	3.25 KB	-rw-rw-rw-
test_audioop.py	28.79 KB	-rw-rw-rw-
test_audit.py	5.56 KB	-rw-rw-rw-
test_augassign.py	8 KB	-rw-rw-rw-
test_base64.py	35.28 KB	-rw-rw-rw-
test_baseexception.py	7.05 KB	-rw-rw-rw-
test_bdb.py	44.64 KB	-rw-rw-rw-
test_bigaddrspace.py	2.93 KB	-rw-rw-rw-
test_bigmem.py	46.01 KB	-rw-rw-rw-
test_binascii.py	19.72 KB	-rw-rw-rw-
test_binhex.py	2.17 KB	-rw-rw-rw-
test_binop.py	14.57 KB	-rw-rw-rw-
test_bisect.py	16.09 KB	-rw-rw-rw-
test_bool.py	12.89 KB	-rw-rw-rw-
test_buffer.py	164.64 KB	-rw-rw-rw-
test_bufio.py	2.65 KB	-rw-rw-rw-
test_builtin.py	87.93 KB	-rw-rw-rw-
test_bytes.py	78.01 KB	-rw-rw-rw-
test_bz2.py	38.22 KB	-rw-rw-rw-
test_c_locale_coercion.py	19.35 KB	-rw-rw-rw-
test_calendar.py	51.76 KB	-rw-rw-rw-
test_call.py	26.95 KB	-rw-rw-rw-
test_capi.py	41.78 KB	-rw-rw-rw-
test_cgi.py	22.89 KB	-rw-rw-rw-
test_cgitb.py	2.61 KB	-rw-rw-rw-
test_charmapcodec.py	1.83 KB	-rw-rw-rw-
test_check_c_globals.py	773 B	-rw-rw-rw-
test_class.py	18.07 KB	-rw-rw-rw-
test_clinic.py	22.35 KB	-rw-rw-rw-
test_cmath.py	24.71 KB	-rw-rw-rw-
test_cmd.py	6.34 KB	-rw-rw-rw-
test_cmd_line.py	36.79 KB	-rw-rw-rw-
test_cmd_line_script.py	33.44 KB	-rw-rw-rw-
test_code.py	13.11 KB	-rw-rw-rw-
test_code_module.py	5.69 KB	-rw-rw-rw-
test_codeccallbacks.py	48.64 KB	-rw-rw-rw-
test_codecencodings_cn.py	3.95 KB	-rw-rw-rw-
test_codecencodings_hk.py	723 B	-rw-rw-rw-
test_codecencodings_iso2022.py	1.4 KB	-rw-rw-rw-
test_codecencodings_jp.py	4.92 KB	-rw-rw-rw-
test_codecencodings_kr.py	3.02 KB	-rw-rw-rw-
test_codecencodings_tw.py	703 B	-rw-rw-rw-
test_codecmaps_cn.py	772 B	-rw-rw-rw-
test_codecmaps_hk.py	401 B	-rw-rw-rw-
test_codecmaps_jp.py	1.76 KB	-rw-rw-rw-
test_codecmaps_kr.py	1.2 KB	-rw-rw-rw-
test_codecmaps_tw.py	732 B	-rw-rw-rw-
test_codecs.py	136.49 KB	-rw-rw-rw-
test_codeop.py	8.65 KB	-rw-rw-rw-
test_collections.py	94.1 KB	-rw-rw-rw-
test_colorsys.py	3.93 KB	-rw-rw-rw-
test_compare.py	3.85 KB	-rw-rw-rw-
test_compile.py	45.9 KB	-rw-rw-rw-
test_compileall.py	47.1 KB	-rw-rw-rw-
test_complex.py	33.54 KB	-rw-rw-rw-
test_concurrent_futures.py	57.2 KB	-rw-rw-rw-
test_configparser.py	87.49 KB	-rw-rw-rw-
test_contains.py	3.46 KB	-rw-rw-rw-
test_context.py	31.7 KB	-rw-rw-rw-
test_contextlib.py	36.33 KB	-rw-rw-rw-
test_contextlib_async.py	19.36 KB	-rw-rw-rw-
test_copy.py	27.28 KB	-rw-rw-rw-
test_copyreg.py	4.52 KB	-rw-rw-rw-
test_coroutines.py	65.27 KB	-rw-rw-rw-
test_cprofile.py	6.45 KB	-rw-rw-rw-
test_crashers.py	1.21 KB	-rw-rw-rw-
test_crypt.py	4.25 KB	-rw-rw-rw-
test_csv.py	52.95 KB	-rw-rw-rw-
test_ctypes.py	209 B	-rw-rw-rw-
test_curses.py	47.87 KB	-rw-rw-rw-
test_dataclasses.py	129.65 KB	-rw-rw-rw-
test_datetime.py	2.37 KB	-rw-rw-rw-
test_dbm.py	6.3 KB	-rw-rw-rw-
test_dbm_dumb.py	10.97 KB	-rw-rw-rw-
test_dbm_gnu.py	6.68 KB	-rw-rw-rw-
test_dbm_ndbm.py	5.24 KB	-rw-rw-rw-
test_decimal.py	214.93 KB	-rw-rw-rw-
test_decorators.py	14.87 KB	-rw-rw-rw-
test_defaultdict.py	6.31 KB	-rw-rw-rw-
test_deque.py	34.67 KB	-rw-rw-rw-
test_descr.py	198.27 KB	-rw-rw-rw-
test_descrtut.py	12.03 KB	-rw-rw-rw-
test_devpoll.py	4.58 KB	-rw-rw-rw-
test_dict.py	52.3 KB	-rw-rw-rw-
test_dict_version.py	6.28 KB	-rw-rw-rw-
test_dictcomps.py	5.28 KB	-rw-rw-rw-
test_dictviews.py	13.81 KB	-rw-rw-rw-
test_difflib.py	22.02 KB	-rw-rw-rw-
test_difflib_expect.html	101.36 KB	-rw-rw-rw-
test_dis.py	57.74 KB	-rw-rw-rw-
test_distutils.py	615 B	-rw-rw-rw-
test_doctest.py	104.21 KB	-rw-rw-rw-
test_doctest.txt	317 B	-rw-rw-rw-
test_doctest2.py	2.48 KB	-rw-rw-rw-
test_doctest2.txt	406 B	-rw-rw-rw-
test_doctest3.txt	87 B	-rw-rw-rw-
test_doctest4.txt	255 B	-rw-rw-rw-
test_docxmlrpc.py	8.88 KB	-rw-rw-rw-
test_dtrace.py	5.31 KB	-rw-rw-rw-
test_dynamic.py	4.43 KB	-rw-rw-rw-
test_dynamicclassattribute.py	9.86 KB	-rw-rw-rw-
test_eintr.py	604 B	-rw-rw-rw-
test_embed.py	57.38 KB	-rw-rw-rw-
test_ensurepip.py	12.55 KB	-rw-rw-rw-
test_enum.py	124.47 KB	-rw-rw-rw-
test_enumerate.py	8.74 KB	-rw-rw-rw-
test_eof.py	3.1 KB	-rw-rw-rw-
test_epoll.py	9.39 KB	-rw-rw-rw-
test_errno.py	1.08 KB	-rw-rw-rw-
test_exception_hierarchy.py	7.63 KB	-rw-rw-rw-
test_exception_variations.py	4.03 KB	-rw-rw-rw-
test_exceptions.py	93.28 KB	-rw-rw-rw-
test_extcall.py	14.57 KB	-rw-rw-rw-
test_faulthandler.py	30.98 KB	-rw-rw-rw-
test_fcntl.py	7.64 KB	-rw-rw-rw-
test_file.py	12.12 KB	-rw-rw-rw-
test_file_eintr.py	10.86 KB	-rw-rw-rw-
test_filecmp.py	10.57 KB	-rw-rw-rw-
test_fileinput.py	40.5 KB	-rw-rw-rw-
test_fileio.py	20.53 KB	-rw-rw-rw-
test_finalization.py	15.18 KB	-rw-rw-rw-
test_float.py	67.75 KB	-rw-rw-rw-
test_flufl.py	1.59 KB	-rw-rw-rw-
test_fnmatch.py	11.38 KB	-rw-rw-rw-
test_fork1.py	3.34 KB	-rw-rw-rw-
test_format.py	24.42 KB	-rw-rw-rw-
test_fractions.py	30.41 KB	-rw-rw-rw-
test_frame.py	6.44 KB	-rw-rw-rw-
test_frozen.py	972 B	-rw-rw-rw-
test_fstring.py	53.85 KB	-rw-rw-rw-
test_ftplib.py	43.12 KB	-rw-rw-rw-
test_funcattrs.py	15.29 KB	-rw-rw-rw-
test_functools.py	105.51 KB	-rw-rw-rw-
test_future.py	15.27 KB	-rw-rw-rw-
test_future3.py	516 B	-rw-rw-rw-
test_future4.py	233 B	-rw-rw-rw-
test_future5.py	531 B	-rw-rw-rw-
test_gc.py	47.3 KB	-rw-rw-rw-
test_gdb.py	42.7 KB	-rw-rw-rw-
test_generator_stop.py	977 B	-rw-rw-rw-
test_generators.py	66.11 KB	-rw-rw-rw-
test_genericalias.py	13.1 KB	-rw-rw-rw-
test_genericclass.py	9.56 KB	-rw-rw-rw-
test_genericpath.py	22.4 KB	-rw-rw-rw-
test_genexps.py	7.92 KB	-rw-rw-rw-
test_getargs2.py	55.19 KB	-rw-rw-rw-
test_getopt.py	6.96 KB	-rw-rw-rw-
test_getpass.py	6.45 KB	-rw-rw-rw-
test_gettext.py	42.36 KB	-rw-rw-rw-
test_glob.py	15.72 KB	-rw-rw-rw-
test_global.py	1.44 KB	-rw-rw-rw-
test_grammar.py	64.47 KB	-rw-rw-rw-
test_graphlib.py	8.59 KB	-rw-rw-rw-
test_grp.py	3.65 KB	-rw-rw-rw-
test_gzip.py	31.45 KB	-rw-rw-rw-
test_hash.py	11.79 KB	-rw-rw-rw-
test_hashlib.py	45.59 KB	-rw-rw-rw-
test_heapq.py	16.91 KB	-rw-rw-rw-
test_hmac.py	26.05 KB	-rw-rw-rw-
test_html.py	4.33 KB	-rw-rw-rw-
test_htmlparser.py	33.7 KB	-rw-rw-rw-
test_http_cookiejar.py	80.28 KB	-rw-rw-rw-
test_http_cookies.py	19.18 KB	-rw-rw-rw-
test_httplib.py	81.2 KB	-rw-rw-rw-
test_httpservers.py	54.65 KB	-rw-rw-rw-
test_idle.py	1.02 KB	-rw-rw-rw-
test_imaplib.py	43.19 KB	-rw-rw-rw-
test_imghdr.py	4.83 KB	-rw-rw-rw-
test_imp.py	18.38 KB	-rw-rw-rw-
test_index.py	8.64 KB	-rw-rw-rw-
test_inspect.py	175.5 KB	-rw-rw-rw-
test_int.py	21.27 KB	-rw-rw-rw-
test_int_literal.py	7.03 KB	-rw-rw-rw-
test_interpreters.py	23.21 KB	-rw-rw-rw-
test_io.py	175.17 KB	-rw-rw-rw-
test_ioctl.py	3.33 KB	-rw-rw-rw-
test_ipaddress.py	119.32 KB	-rw-rw-rw-
test_isinstance.py	13.31 KB	-rw-rw-rw-
test_iter.py	33.93 KB	-rw-rw-rw-
test_iterlen.py	7.32 KB	-rw-rw-rw-
test_itertools.py	108.41 KB	-rw-rw-rw-
test_keyword.py	1.27 KB	-rw-rw-rw-
test_keywordonlyarg.py	7.07 KB	-rw-rw-rw-
test_kqueue.py	9.01 KB	-rw-rw-rw-
test_largefile.py	10.26 KB	-rw-rw-rw-
test_lib2to3.py	327 B	-rw-rw-rw-
test_linecache.py	9.92 KB	-rw-rw-rw-
test_list.py	7.76 KB	-rw-rw-rw-
test_listcomps.py	4.33 KB	-rw-rw-rw-
test_lltrace.py	3.22 KB	-rw-rw-rw-
test_locale.py	25.29 KB	-rw-rw-rw-
test_logging.py	200.75 KB	-rw-rw-rw-
test_long.py	55.19 KB	-rw-rw-rw-
test_longexp.py	243 B	-rw-rw-rw-
test_lzma.py	90.07 KB	-rw-rw-rw-
test_mailbox.py	94.04 KB	-rw-rw-rw-
test_mailcap.py	10.25 KB	-rw-rw-rw-
test_marshal.py	21.04 KB	-rw-rw-rw-
test_math.py	92.69 KB	-rw-rw-rw-
test_memoryio.py	32.33 KB	-rw-rw-rw-
test_memoryview.py	22.01 KB	-rw-rw-rw-
test_metaclass.py	6.47 KB	-rw-rw-rw-
test_mimetypes.py	14.17 KB	-rw-rw-rw-
test_minidom.py	69.82 KB	-rw-rw-rw-
test_mmap.py	31.71 KB	-rw-rw-rw-
test_module.py	12.71 KB	-rw-rw-rw-
test_modulefinder.py	12.63 KB	-rw-rw-rw-
test_msilib.py	5.57 KB	-rw-rw-rw-
test_multibytecodec.py	16.15 KB	-rw-rw-rw-
test_multiprocessing_fork.py	496 B	-rw-rw-rw-
test_multiprocessing_forkserve...	408 B	-rw-rw-rw-
test_multiprocessing_main_hand...	11.86 KB	-rw-rw-rw-
test_multiprocessing_spawn.py	289 B	-rw-rw-rw-
test_named_expressions.py	21.21 KB	-rw-rw-rw-
test_netrc.py	6.17 KB	-rw-rw-rw-
test_nis.py	1.21 KB	-rw-rw-rw-
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Code Editor : test_complex.py

import unittest
import sys
from test import support
from test.test_grammar import (VALID_UNDERSCORE_LITERALS,
                               INVALID_UNDERSCORE_LITERALS)

from random import random
from math import atan2, isnan, copysign
import operator

INF = float("inf")
NAN = float("nan")
# These tests ensure that complex math does the right thing

ZERO_DIVISION = (
    (1+1j, 0+0j),
    (1+1j, 0.0),
    (1+1j, 0),
    (1.0, 0+0j),
    (1, 0+0j),
)

class ComplexTest(unittest.TestCase):

def assertAlmostEqual(self, a, b):
        if isinstance(a, complex):
            if isinstance(b, complex):
                unittest.TestCase.assertAlmostEqual(self, a.real, b.real)
                unittest.TestCase.assertAlmostEqual(self, a.imag, b.imag)
            else:
                unittest.TestCase.assertAlmostEqual(self, a.real, b)
                unittest.TestCase.assertAlmostEqual(self, a.imag, 0.)
        else:
            if isinstance(b, complex):
                unittest.TestCase.assertAlmostEqual(self, a, b.real)
                unittest.TestCase.assertAlmostEqual(self, 0., b.imag)
            else:
                unittest.TestCase.assertAlmostEqual(self, a, b)

def assertCloseAbs(self, x, y, eps=1e-9):
        """Return true iff floats x and y "are close"."""
        # put the one with larger magnitude second
        if abs(x) > abs(y):
            x, y = y, x
        if y == 0:
            return abs(x) < eps
        if x == 0:
            return abs(y) < eps
        # check that relative difference < eps
        self.assertTrue(abs((x-y)/y) < eps)

def assertFloatsAreIdentical(self, x, y):
        """assert that floats x and y are identical, in the sense that:
        (1) both x and y are nans, or
        (2) both x and y are infinities, with the same sign, or
        (3) both x and y are zeros, with the same sign, or
        (4) x and y are both finite and nonzero, and x == y

"""
        msg = 'floats {!r} and {!r} are not identical'

if isnan(x) or isnan(y):
            if isnan(x) and isnan(y):
                return
        elif x == y:
            if x != 0.0:
                return
            # both zero; check that signs match
            elif copysign(1.0, x) == copysign(1.0, y):
                return
            else:
                msg += ': zeros have different signs'
        self.fail(msg.format(x, y))

def assertClose(self, x, y, eps=1e-9):
        """Return true iff complexes x and y "are close"."""
        self.assertCloseAbs(x.real, y.real, eps)
        self.assertCloseAbs(x.imag, y.imag, eps)

def check_div(self, x, y):
        """Compute complex z=x*y, and check that z/x==y and z/y==x."""
        z = x * y
        if x != 0:
            q = z / x
            self.assertClose(q, y)
            q = z.__truediv__(x)
            self.assertClose(q, y)
        if y != 0:
            q = z / y
            self.assertClose(q, x)
            q = z.__truediv__(y)
            self.assertClose(q, x)

def test_truediv(self):
        simple_real = [float(i) for i in range(-5, 6)]
        simple_complex = [complex(x, y) for x in simple_real for y in simple_real]
        for x in simple_complex:
            for y in simple_complex:
                self.check_div(x, y)

# A naive complex division algorithm (such as in 2.0) is very prone to
        # nonsense errors for these (overflows and underflows).
        self.check_div(complex(1e200, 1e200), 1+0j)
        self.check_div(complex(1e-200, 1e-200), 1+0j)

# Just for fun.
        for i in range(100):
            self.check_div(complex(random(), random()),
                           complex(random(), random()))

self.assertAlmostEqual(complex.__truediv__(2+0j, 1+1j), 1-1j)

for denom_real, denom_imag in [(0, NAN), (NAN, 0), (NAN, NAN)]:
            z = complex(0, 0) / complex(denom_real, denom_imag)
            self.assertTrue(isnan(z.real))
            self.assertTrue(isnan(z.imag))

def test_truediv_zero_division(self):
        for a, b in ZERO_DIVISION:
            with self.assertRaises(ZeroDivisionError):
                a / b

def test_floordiv(self):
        with self.assertRaises(TypeError):
            (1+1j) // (1+0j)
        with self.assertRaises(TypeError):
            (1+1j) // 1.0
        with self.assertRaises(TypeError):
            (1+1j) // 1
        with self.assertRaises(TypeError):
            1.0 // (1+0j)
        with self.assertRaises(TypeError):
            1 // (1+0j)

def test_floordiv_zero_division(self):
        for a, b in ZERO_DIVISION:
            with self.assertRaises(TypeError):
                a // b

def test_richcompare(self):
        self.assertIs(complex.__eq__(1+1j, 1<<10000), False)
        self.assertIs(complex.__lt__(1+1j, None), NotImplemented)
        self.assertIs(complex.__eq__(1+1j, 1+1j), True)
        self.assertIs(complex.__eq__(1+1j, 2+2j), False)
        self.assertIs(complex.__ne__(1+1j, 1+1j), False)
        self.assertIs(complex.__ne__(1+1j, 2+2j), True)
        for i in range(1, 100):
            f = i / 100.0
            self.assertIs(complex.__eq__(f+0j, f), True)
            self.assertIs(complex.__ne__(f+0j, f), False)
            self.assertIs(complex.__eq__(complex(f, f), f), False)
            self.assertIs(complex.__ne__(complex(f, f), f), True)
        self.assertIs(complex.__lt__(1+1j, 2+2j), NotImplemented)
        self.assertIs(complex.__le__(1+1j, 2+2j), NotImplemented)
        self.assertIs(complex.__gt__(1+1j, 2+2j), NotImplemented)
        self.assertIs(complex.__ge__(1+1j, 2+2j), NotImplemented)
        self.assertRaises(TypeError, operator.lt, 1+1j, 2+2j)
        self.assertRaises(TypeError, operator.le, 1+1j, 2+2j)
        self.assertRaises(TypeError, operator.gt, 1+1j, 2+2j)
        self.assertRaises(TypeError, operator.ge, 1+1j, 2+2j)
        self.assertIs(operator.eq(1+1j, 1+1j), True)
        self.assertIs(operator.eq(1+1j, 2+2j), False)
        self.assertIs(operator.ne(1+1j, 1+1j), False)
        self.assertIs(operator.ne(1+1j, 2+2j), True)

def test_richcompare_boundaries(self):
        def check(n, deltas, is_equal, imag = 0.0):
            for delta in deltas:
                i = n + delta
                z = complex(i, imag)
                self.assertIs(complex.__eq__(z, i), is_equal(delta))
                self.assertIs(complex.__ne__(z, i), not is_equal(delta))
        # For IEEE-754 doubles the following should hold:
        #    x in [2 ** (52 + i), 2 ** (53 + i + 1)] -> x mod 2 ** i == 0
        # where the interval is representable, of course.
        for i in range(1, 10):
            pow = 52 + i
            mult = 2 ** i
            check(2 ** pow, range(1, 101), lambda delta: delta % mult == 0)
            check(2 ** pow, range(1, 101), lambda delta: False, float(i))
        check(2 ** 53, range(-100, 0), lambda delta: True)

def test_mod(self):
        # % is no longer supported on complex numbers
        with self.assertRaises(TypeError):
            (1+1j) % (1+0j)
        with self.assertRaises(TypeError):
            (1+1j) % 1.0
        with self.assertRaises(TypeError):
            (1+1j) % 1
        with self.assertRaises(TypeError):
            1.0 % (1+0j)
        with self.assertRaises(TypeError):
            1 % (1+0j)

def test_mod_zero_division(self):
        for a, b in ZERO_DIVISION:
            with self.assertRaises(TypeError):
                a % b

def test_divmod(self):
        self.assertRaises(TypeError, divmod, 1+1j, 1+0j)
        self.assertRaises(TypeError, divmod, 1+1j, 1.0)
        self.assertRaises(TypeError, divmod, 1+1j, 1)
        self.assertRaises(TypeError, divmod, 1.0, 1+0j)
        self.assertRaises(TypeError, divmod, 1, 1+0j)

def test_divmod_zero_division(self):
        for a, b in ZERO_DIVISION:
            self.assertRaises(TypeError, divmod, a, b)

def test_pow(self):
        self.assertAlmostEqual(pow(1+1j, 0+0j), 1.0)
        self.assertAlmostEqual(pow(0+0j, 2+0j), 0.0)
        self.assertRaises(ZeroDivisionError, pow, 0+0j, 1j)
        self.assertAlmostEqual(pow(1j, -1), 1/1j)
        self.assertAlmostEqual(pow(1j, 200), 1)
        self.assertRaises(ValueError, pow, 1+1j, 1+1j, 1+1j)
        self.assertRaises(OverflowError, pow, 1e200+1j, 1e200+1j)

a = 3.33+4.43j
        self.assertEqual(a ** 0j, 1)
        self.assertEqual(a ** 0.+0.j, 1)

self.assertEqual(3j ** 0j, 1)
        self.assertEqual(3j ** 0, 1)

try:
            0j ** a
        except ZeroDivisionError:
            pass
        else:
            self.fail("should fail 0.0 to negative or complex power")

try:
            0j ** (3-2j)
        except ZeroDivisionError:
            pass
        else:
            self.fail("should fail 0.0 to negative or complex power")

# The following is used to exercise certain code paths
        self.assertEqual(a ** 105, a ** 105)
        self.assertEqual(a ** -105, a ** -105)
        self.assertEqual(a ** -30, a ** -30)

self.assertEqual(0.0j ** 0, 1)

b = 5.1+2.3j
        self.assertRaises(ValueError, pow, a, b, 0)

# Check some boundary conditions; some of these used to invoke
        # undefined behaviour (https://bugs.python.org/issue44698). We're
        # not actually checking the results of these operations, just making
        # sure they don't crash (for example when using clang's
        # UndefinedBehaviourSanitizer).
        values = (sys.maxsize, sys.maxsize+1, sys.maxsize-1,
                  -sys.maxsize, -sys.maxsize+1, -sys.maxsize+1)
        for real in values:
            for imag in values:
                with self.subTest(real=real, imag=imag):
                    c = complex(real, imag)
                    try:
                        c ** real
                    except OverflowError:
                        pass
                    try:
                        c ** c
                    except OverflowError:
                        pass

def test_pow_with_small_integer_exponents(self):
        # Check that small integer exponents are handled identically
        # regardless of their type.
        values = [
            complex(5.0, 12.0),
            complex(5.0e100, 12.0e100),
            complex(-4.0, INF),
            complex(INF, 0.0),
        ]
        exponents = [-19, -5, -3, -2, -1, 0, 1, 2, 3, 5, 19]
        for value in values:
            for exponent in exponents:
                with self.subTest(value=value, exponent=exponent):
                    try:
                        int_pow = value**exponent
                    except OverflowError:
                        int_pow = "overflow"
                    try:
                        float_pow = value**float(exponent)
                    except OverflowError:
                        float_pow = "overflow"
                    try:
                        complex_pow = value**complex(exponent)
                    except OverflowError:
                        complex_pow = "overflow"
                    self.assertEqual(str(float_pow), str(int_pow))
                    self.assertEqual(str(complex_pow), str(int_pow))

def test_boolcontext(self):
        for i in range(100):
            self.assertTrue(complex(random() + 1e-6, random() + 1e-6))
        self.assertTrue(not complex(0.0, 0.0))

def test_conjugate(self):
        self.assertClose(complex(5.3, 9.8).conjugate(), 5.3-9.8j)

def test_constructor(self):
        class OS:
            def __init__(self, value): self.value = value
            def __complex__(self): return self.value
        class NS(object):
            def __init__(self, value): self.value = value
            def __complex__(self): return self.value
        self.assertEqual(complex(OS(1+10j)), 1+10j)
        self.assertEqual(complex(NS(1+10j)), 1+10j)
        self.assertRaises(TypeError, complex, OS(None))
        self.assertRaises(TypeError, complex, NS(None))
        self.assertRaises(TypeError, complex, {})
        self.assertRaises(TypeError, complex, NS(1.5))
        self.assertRaises(TypeError, complex, NS(1))

self.assertAlmostEqual(complex("1+10j"), 1+10j)
        self.assertAlmostEqual(complex(10), 10+0j)
        self.assertAlmostEqual(complex(10.0), 10+0j)
        self.assertAlmostEqual(complex(10), 10+0j)
        self.assertAlmostEqual(complex(10+0j), 10+0j)
        self.assertAlmostEqual(complex(1,10), 1+10j)
        self.assertAlmostEqual(complex(1,10), 1+10j)
        self.assertAlmostEqual(complex(1,10.0), 1+10j)
        self.assertAlmostEqual(complex(1,10), 1+10j)
        self.assertAlmostEqual(complex(1,10), 1+10j)
        self.assertAlmostEqual(complex(1,10.0), 1+10j)
        self.assertAlmostEqual(complex(1.0,10), 1+10j)
        self.assertAlmostEqual(complex(1.0,10), 1+10j)
        self.assertAlmostEqual(complex(1.0,10.0), 1+10j)
        self.assertAlmostEqual(complex(3.14+0j), 3.14+0j)
        self.assertAlmostEqual(complex(3.14), 3.14+0j)
        self.assertAlmostEqual(complex(314), 314.0+0j)
        self.assertAlmostEqual(complex(314), 314.0+0j)
        self.assertAlmostEqual(complex(3.14+0j, 0j), 3.14+0j)
        self.assertAlmostEqual(complex(3.14, 0.0), 3.14+0j)
        self.assertAlmostEqual(complex(314, 0), 314.0+0j)
        self.assertAlmostEqual(complex(314, 0), 314.0+0j)
        self.assertAlmostEqual(complex(0j, 3.14j), -3.14+0j)
        self.assertAlmostEqual(complex(0.0, 3.14j), -3.14+0j)
        self.assertAlmostEqual(complex(0j, 3.14), 3.14j)
        self.assertAlmostEqual(complex(0.0, 3.14), 3.14j)
        self.assertAlmostEqual(complex("1"), 1+0j)
        self.assertAlmostEqual(complex("1j"), 1j)
        self.assertAlmostEqual(complex(),  0)
        self.assertAlmostEqual(complex("-1"), -1)
        self.assertAlmostEqual(complex("+1"), +1)
        self.assertAlmostEqual(complex("(1+2j)"), 1+2j)
        self.assertAlmostEqual(complex("(1.3+2.2j)"), 1.3+2.2j)
        self.assertAlmostEqual(complex("3.14+1J"), 3.14+1j)
        self.assertAlmostEqual(complex(" ( +3.14-6J )"), 3.14-6j)
        self.assertAlmostEqual(complex(" ( +3.14-J )"), 3.14-1j)
        self.assertAlmostEqual(complex(" ( +3.14+j )"), 3.14+1j)
        self.assertAlmostEqual(complex("J"), 1j)
        self.assertAlmostEqual(complex("( j )"), 1j)
        self.assertAlmostEqual(complex("+J"), 1j)
        self.assertAlmostEqual(complex("( -j)"), -1j)
        self.assertAlmostEqual(complex('1e-500'), 0.0 + 0.0j)
        self.assertAlmostEqual(complex('-1e-500j'), 0.0 - 0.0j)
        self.assertAlmostEqual(complex('-1e-500+1e-500j'), -0.0 + 0.0j)

class complex2(complex): pass
        self.assertAlmostEqual(complex(complex2(1+1j)), 1+1j)
        self.assertAlmostEqual(complex(real=17, imag=23), 17+23j)
        self.assertAlmostEqual(complex(real=17+23j), 17+23j)
        self.assertAlmostEqual(complex(real=17+23j, imag=23), 17+46j)
        self.assertAlmostEqual(complex(real=1+2j, imag=3+4j), -3+5j)

# check that the sign of a zero in the real or imaginary part
        # is preserved when constructing from two floats.  (These checks
        # are harmless on systems without support for signed zeros.)
        def split_zeros(x):
            """Function that produces different results for 0. and -0."""
            return atan2(x, -1.)

self.assertEqual(split_zeros(complex(1., 0.).imag), split_zeros(0.))
        self.assertEqual(split_zeros(complex(1., -0.).imag), split_zeros(-0.))
        self.assertEqual(split_zeros(complex(0., 1.).real), split_zeros(0.))
        self.assertEqual(split_zeros(complex(-0., 1.).real), split_zeros(-0.))

c = 3.14 + 1j
        self.assertTrue(complex(c) is c)
        del c

self.assertRaises(TypeError, complex, "1", "1")
        self.assertRaises(TypeError, complex, 1, "1")

# SF bug 543840:  complex(string) accepts strings with \0
        # Fixed in 2.3.
        self.assertRaises(ValueError, complex, '1+1j\0j')

self.assertRaises(TypeError, int, 5+3j)
        self.assertRaises(TypeError, int, 5+3j)
        self.assertRaises(TypeError, float, 5+3j)
        self.assertRaises(ValueError, complex, "")
        self.assertRaises(TypeError, complex, None)
        self.assertRaisesRegex(TypeError, "not 'NoneType'", complex, None)
        self.assertRaises(ValueError, complex, "\0")
        self.assertRaises(ValueError, complex, "3\09")
        self.assertRaises(TypeError, complex, "1", "2")
        self.assertRaises(TypeError, complex, "1", 42)
        self.assertRaises(TypeError, complex, 1, "2")
        self.assertRaises(ValueError, complex, "1+")
        self.assertRaises(ValueError, complex, "1+1j+1j")
        self.assertRaises(ValueError, complex, "--")
        self.assertRaises(ValueError, complex, "(1+2j")
        self.assertRaises(ValueError, complex, "1+2j)")
        self.assertRaises(ValueError, complex, "1+(2j)")
        self.assertRaises(ValueError, complex, "(1+2j)123")
        self.assertRaises(ValueError, complex, "x")
        self.assertRaises(ValueError, complex, "1j+2")
        self.assertRaises(ValueError, complex, "1e1ej")
        self.assertRaises(ValueError, complex, "1e++1ej")
        self.assertRaises(ValueError, complex, ")1+2j(")
        self.assertRaisesRegex(
            TypeError,
            "first argument must be a string or a number, not 'dict'",
            complex, {1:2}, 1)
        self.assertRaisesRegex(
            TypeError,
            "second argument must be a number, not 'dict'",
            complex, 1, {1:2})
        # the following three are accepted by Python 2.6
        self.assertRaises(ValueError, complex, "1..1j")
        self.assertRaises(ValueError, complex, "1.11.1j")
        self.assertRaises(ValueError, complex, "1e1.1j")

# check that complex accepts long unicode strings
        self.assertEqual(type(complex("1"*500)), complex)
        # check whitespace processing
        self.assertEqual(complex('\N{EM SPACE}(\N{EN SPACE}1+1j ) '), 1+1j)
        # Invalid unicode string
        # See bpo-34087
        self.assertRaises(ValueError, complex, '\u3053\u3093\u306b\u3061\u306f')

class EvilExc(Exception):
            pass

class evilcomplex:
            def __complex__(self):
                raise EvilExc

self.assertRaises(EvilExc, complex, evilcomplex())

class float2:
            def __init__(self, value):
                self.value = value
            def __float__(self):
                return self.value

self.assertAlmostEqual(complex(float2(42.)), 42)
        self.assertAlmostEqual(complex(real=float2(17.), imag=float2(23.)), 17+23j)
        self.assertRaises(TypeError, complex, float2(None))

class MyIndex:
            def __init__(self, value):
                self.value = value
            def __index__(self):
                return self.value

self.assertAlmostEqual(complex(MyIndex(42)), 42.0+0.0j)
        self.assertAlmostEqual(complex(123, MyIndex(42)), 123.0+42.0j)
        self.assertRaises(OverflowError, complex, MyIndex(2**2000))
        self.assertRaises(OverflowError, complex, 123, MyIndex(2**2000))

class MyInt:
            def __int__(self):
                return 42

self.assertRaises(TypeError, complex, MyInt())
        self.assertRaises(TypeError, complex, 123, MyInt())

class complex0(complex):
            """Test usage of __complex__() when inheriting from 'complex'"""
            def __complex__(self):
                return 42j

class complex1(complex):
            """Test usage of __complex__() with a __new__() method"""
            def __new__(self, value=0j):
                return complex.__new__(self, 2*value)
            def __complex__(self):
                return self

class complex2(complex):
            """Make sure that __complex__() calls fail if anything other than a
            complex is returned"""
            def __complex__(self):
                return None

self.assertEqual(complex(complex0(1j)), 42j)
        with self.assertWarns(DeprecationWarning):
            self.assertEqual(complex(complex1(1j)), 2j)
        self.assertRaises(TypeError, complex, complex2(1j))

@support.requires_IEEE_754
    def test_constructor_special_numbers(self):
        class complex2(complex):
            pass
        for x in 0.0, -0.0, INF, -INF, NAN:
            for y in 0.0, -0.0, INF, -INF, NAN:
                with self.subTest(x=x, y=y):
                    z = complex(x, y)
                    self.assertFloatsAreIdentical(z.real, x)
                    self.assertFloatsAreIdentical(z.imag, y)
                    z = complex2(x, y)
                    self.assertIs(type(z), complex2)
                    self.assertFloatsAreIdentical(z.real, x)
                    self.assertFloatsAreIdentical(z.imag, y)
                    z = complex(complex2(x, y))
                    self.assertIs(type(z), complex)
                    self.assertFloatsAreIdentical(z.real, x)
                    self.assertFloatsAreIdentical(z.imag, y)
                    z = complex2(complex(x, y))
                    self.assertIs(type(z), complex2)
                    self.assertFloatsAreIdentical(z.real, x)
                    self.assertFloatsAreIdentical(z.imag, y)

def test_underscores(self):
        # check underscores
        for lit in VALID_UNDERSCORE_LITERALS:
            if not any(ch in lit for ch in 'xXoObB'):
                self.assertEqual(complex(lit), eval(lit))
                self.assertEqual(complex(lit), complex(lit.replace('_', '')))
        for lit in INVALID_UNDERSCORE_LITERALS:
            if lit in ('0_7', '09_99'):  # octals are not recognized here
                continue
            if not any(ch in lit for ch in 'xXoObB'):
                self.assertRaises(ValueError, complex, lit)

def test_hash(self):
        for x in range(-30, 30):
            self.assertEqual(hash(x), hash(complex(x, 0)))
            x /= 3.0    # now check against floating point
            self.assertEqual(hash(x), hash(complex(x, 0.)))

def test_abs(self):
        nums = [complex(x/3., y/7.) for x in range(-9,9) for y in range(-9,9)]
        for num in nums:
            self.assertAlmostEqual((num.real**2 + num.imag**2)  ** 0.5, abs(num))

def test_repr_str(self):
        def test(v, expected, test_fn=self.assertEqual):
            test_fn(repr(v), expected)
            test_fn(str(v), expected)

test(1+6j, '(1+6j)')
        test(1-6j, '(1-6j)')

test(-(1+0j), '(-1+-0j)', test_fn=self.assertNotEqual)

test(complex(1., INF), "(1+infj)")
        test(complex(1., -INF), "(1-infj)")
        test(complex(INF, 1), "(inf+1j)")
        test(complex(-INF, INF), "(-inf+infj)")
        test(complex(NAN, 1), "(nan+1j)")
        test(complex(1, NAN), "(1+nanj)")
        test(complex(NAN, NAN), "(nan+nanj)")

test(complex(0, INF), "infj")
        test(complex(0, -INF), "-infj")
        test(complex(0, NAN), "nanj")

self.assertEqual(1-6j,complex(repr(1-6j)))
        self.assertEqual(1+6j,complex(repr(1+6j)))
        self.assertEqual(-6j,complex(repr(-6j)))
        self.assertEqual(6j,complex(repr(6j)))

@support.requires_IEEE_754
    def test_negative_zero_repr_str(self):
        def test(v, expected, test_fn=self.assertEqual):
            test_fn(repr(v), expected)
            test_fn(str(v), expected)

test(complex(0., 1.),   "1j")
        test(complex(-0., 1.),  "(-0+1j)")
        test(complex(0., -1.),  "-1j")
        test(complex(-0., -1.), "(-0-1j)")

test(complex(0., 0.),   "0j")
        test(complex(0., -0.),  "-0j")
        test(complex(-0., 0.),  "(-0+0j)")
        test(complex(-0., -0.), "(-0-0j)")

def test_neg(self):
        self.assertEqual(-(1+6j), -1-6j)

def test_getnewargs(self):
        self.assertEqual((1+2j).__getnewargs__(), (1.0, 2.0))
        self.assertEqual((1-2j).__getnewargs__(), (1.0, -2.0))
        self.assertEqual((2j).__getnewargs__(), (0.0, 2.0))
        self.assertEqual((-0j).__getnewargs__(), (0.0, -0.0))
        self.assertEqual(complex(0, INF).__getnewargs__(), (0.0, INF))
        self.assertEqual(complex(INF, 0).__getnewargs__(), (INF, 0.0))

@support.requires_IEEE_754
    def test_plus_minus_0j(self):
        # test that -0j and 0j literals are not identified
        z1, z2 = 0j, -0j
        self.assertEqual(atan2(z1.imag, -1.), atan2(0., -1.))
        self.assertEqual(atan2(z2.imag, -1.), atan2(-0., -1.))

@support.requires_IEEE_754
    def test_negated_imaginary_literal(self):
        z0 = -0j
        z1 = -7j
        z2 = -1e1000j
        # Note: In versions of Python < 3.2, a negated imaginary literal
        # accidentally ended up with real part 0.0 instead of -0.0, thanks to a
        # modification during CST -> AST translation (see issue #9011).  That's
        # fixed in Python 3.2.
        self.assertFloatsAreIdentical(z0.real, -0.0)
        self.assertFloatsAreIdentical(z0.imag, -0.0)
        self.assertFloatsAreIdentical(z1.real, -0.0)
        self.assertFloatsAreIdentical(z1.imag, -7.0)
        self.assertFloatsAreIdentical(z2.real, -0.0)
        self.assertFloatsAreIdentical(z2.imag, -INF)

@support.requires_IEEE_754
    def test_overflow(self):
        self.assertEqual(complex("1e500"), complex(INF, 0.0))
        self.assertEqual(complex("-1e500j"), complex(0.0, -INF))
        self.assertEqual(complex("-1e500+1.8e308j"), complex(-INF, INF))

@support.requires_IEEE_754
    def test_repr_roundtrip(self):
        vals = [0.0, 1e-500, 1e-315, 1e-200, 0.0123, 3.1415, 1e50, INF, NAN]
        vals += [-v for v in vals]

# complex(repr(z)) should recover z exactly, even for complex
        # numbers involving an infinity, nan, or negative zero
        for x in vals:
            for y in vals:
                z = complex(x, y)
                roundtrip = complex(repr(z))
                self.assertFloatsAreIdentical(z.real, roundtrip.real)
                self.assertFloatsAreIdentical(z.imag, roundtrip.imag)

# if we predefine some constants, then eval(repr(z)) should
        # also work, except that it might change the sign of zeros
        inf, nan = float('inf'), float('nan')
        infj, nanj = complex(0.0, inf), complex(0.0, nan)
        for x in vals:
            for y in vals:
                z = complex(x, y)
                roundtrip = eval(repr(z))
                # adding 0.0 has no effect beside changing -0.0 to 0.0
                self.assertFloatsAreIdentical(0.0 + z.real,
                                              0.0 + roundtrip.real)
                self.assertFloatsAreIdentical(0.0 + z.imag,
                                              0.0 + roundtrip.imag)

def test_format(self):
        # empty format string is same as str()
        self.assertEqual(format(1+3j, ''), str(1+3j))
        self.assertEqual(format(1.5+3.5j, ''), str(1.5+3.5j))
        self.assertEqual(format(3j, ''), str(3j))
        self.assertEqual(format(3.2j, ''), str(3.2j))
        self.assertEqual(format(3+0j, ''), str(3+0j))
        self.assertEqual(format(3.2+0j, ''), str(3.2+0j))

# empty presentation type should still be analogous to str,
        # even when format string is nonempty (issue #5920).
        self.assertEqual(format(3.2+0j, '-'), str(3.2+0j))
        self.assertEqual(format(3.2+0j, '<'), str(3.2+0j))
        z = 4/7. - 100j/7.
        self.assertEqual(format(z, ''), str(z))
        self.assertEqual(format(z, '-'), str(z))
        self.assertEqual(format(z, '<'), str(z))
        self.assertEqual(format(z, '10'), str(z))
        z = complex(0.0, 3.0)
        self.assertEqual(format(z, ''), str(z))
        self.assertEqual(format(z, '-'), str(z))
        self.assertEqual(format(z, '<'), str(z))
        self.assertEqual(format(z, '2'), str(z))
        z = complex(-0.0, 2.0)
        self.assertEqual(format(z, ''), str(z))
        self.assertEqual(format(z, '-'), str(z))
        self.assertEqual(format(z, '<'), str(z))
        self.assertEqual(format(z, '3'), str(z))

self.assertEqual(format(1+3j, 'g'), '1+3j')
        self.assertEqual(format(3j, 'g'), '0+3j')
        self.assertEqual(format(1.5+3.5j, 'g'), '1.5+3.5j')

self.assertEqual(format(1.5+3.5j, '+g'), '+1.5+3.5j')
        self.assertEqual(format(1.5-3.5j, '+g'), '+1.5-3.5j')
        self.assertEqual(format(1.5-3.5j, '-g'), '1.5-3.5j')
        self.assertEqual(format(1.5+3.5j, ' g'), ' 1.5+3.5j')
        self.assertEqual(format(1.5-3.5j, ' g'), ' 1.5-3.5j')
        self.assertEqual(format(-1.5+3.5j, ' g'), '-1.5+3.5j')
        self.assertEqual(format(-1.5-3.5j, ' g'), '-1.5-3.5j')

self.assertEqual(format(-1.5-3.5e-20j, 'g'), '-1.5-3.5e-20j')
        self.assertEqual(format(-1.5-3.5j, 'f'), '-1.500000-3.500000j')
        self.assertEqual(format(-1.5-3.5j, 'F'), '-1.500000-3.500000j')
        self.assertEqual(format(-1.5-3.5j, 'e'), '-1.500000e+00-3.500000e+00j')
        self.assertEqual(format(-1.5-3.5j, '.2e'), '-1.50e+00-3.50e+00j')
        self.assertEqual(format(-1.5-3.5j, '.2E'), '-1.50E+00-3.50E+00j')
        self.assertEqual(format(-1.5e10-3.5e5j, '.2G'), '-1.5E+10-3.5E+05j')

self.assertEqual(format(1.5+3j, '<20g'),  '1.5+3j              ')
        self.assertEqual(format(1.5+3j, '*<20g'), '1.5+3j**************')
        self.assertEqual(format(1.5+3j, '>20g'),  '              1.5+3j')
        self.assertEqual(format(1.5+3j, '^20g'),  '       1.5+3j       ')
        self.assertEqual(format(1.5+3j, '<20'),   '(1.5+3j)            ')
        self.assertEqual(format(1.5+3j, '>20'),   '            (1.5+3j)')
        self.assertEqual(format(1.5+3j, '^20'),   '      (1.5+3j)      ')
        self.assertEqual(format(1.123-3.123j, '^20.2'), '     (1.1-3.1j)     ')

self.assertEqual(format(1.5+3j, '20.2f'), '          1.50+3.00j')
        self.assertEqual(format(1.5+3j, '>20.2f'), '          1.50+3.00j')
        self.assertEqual(format(1.5+3j, '<20.2f'), '1.50+3.00j          ')
        self.assertEqual(format(1.5e20+3j, '<20.2f'), '150000000000000000000.00+3.00j')
        self.assertEqual(format(1.5e20+3j, '>40.2f'), '          150000000000000000000.00+3.00j')
        self.assertEqual(format(1.5e20+3j, '^40,.2f'), '  150,000,000,000,000,000,000.00+3.00j  ')
        self.assertEqual(format(1.5e21+3j, '^40,.2f'), ' 1,500,000,000,000,000,000,000.00+3.00j ')
        self.assertEqual(format(1.5e21+3000j, ',.2f'), '1,500,000,000,000,000,000,000.00+3,000.00j')

# Issue 7094: Alternate formatting (specified by #)
        self.assertEqual(format(1+1j, '.0e'), '1e+00+1e+00j')
        self.assertEqual(format(1+1j, '#.0e'), '1.e+00+1.e+00j')
        self.assertEqual(format(1+1j, '.0f'), '1+1j')
        self.assertEqual(format(1+1j, '#.0f'), '1.+1.j')
        self.assertEqual(format(1.1+1.1j, 'g'), '1.1+1.1j')
        self.assertEqual(format(1.1+1.1j, '#g'), '1.10000+1.10000j')

# Alternate doesn't make a difference for these, they format the same with or without it
        self.assertEqual(format(1+1j, '.1e'),  '1.0e+00+1.0e+00j')
        self.assertEqual(format(1+1j, '#.1e'), '1.0e+00+1.0e+00j')
        self.assertEqual(format(1+1j, '.1f'),  '1.0+1.0j')
        self.assertEqual(format(1+1j, '#.1f'), '1.0+1.0j')

# Misc. other alternate tests
        self.assertEqual(format((-1.5+0.5j), '#f'), '-1.500000+0.500000j')
        self.assertEqual(format((-1.5+0.5j), '#.0f'), '-2.+0.j')
        self.assertEqual(format((-1.5+0.5j), '#e'), '-1.500000e+00+5.000000e-01j')
        self.assertEqual(format((-1.5+0.5j), '#.0e'), '-2.e+00+5.e-01j')
        self.assertEqual(format((-1.5+0.5j), '#g'), '-1.50000+0.500000j')
        self.assertEqual(format((-1.5+0.5j), '.0g'), '-2+0.5j')
        self.assertEqual(format((-1.5+0.5j), '#.0g'), '-2.+0.5j')

# zero padding is invalid
        self.assertRaises(ValueError, (1.5+0.5j).__format__, '010f')

# '=' alignment is invalid
        self.assertRaises(ValueError, (1.5+3j).__format__, '=20')

# integer presentation types are an error
        for t in 'bcdoxX':
            self.assertRaises(ValueError, (1.5+0.5j).__format__, t)

# make sure everything works in ''.format()
        self.assertEqual('*{0:.3f}*'.format(3.14159+2.71828j), '*3.142+2.718j*')

# issue 3382
        self.assertEqual(format(complex(NAN, NAN), 'f'), 'nan+nanj')
        self.assertEqual(format(complex(1, NAN), 'f'), '1.000000+nanj')
        self.assertEqual(format(complex(NAN, 1), 'f'), 'nan+1.000000j')
        self.assertEqual(format(complex(NAN, -1), 'f'), 'nan-1.000000j')
        self.assertEqual(format(complex(NAN, NAN), 'F'), 'NAN+NANj')
        self.assertEqual(format(complex(1, NAN), 'F'), '1.000000+NANj')
        self.assertEqual(format(complex(NAN, 1), 'F'), 'NAN+1.000000j')
        self.assertEqual(format(complex(NAN, -1), 'F'), 'NAN-1.000000j')
        self.assertEqual(format(complex(INF, INF), 'f'), 'inf+infj')
        self.assertEqual(format(complex(1, INF), 'f'), '1.000000+infj')
        self.assertEqual(format(complex(INF, 1), 'f'), 'inf+1.000000j')
        self.assertEqual(format(complex(INF, -1), 'f'), 'inf-1.000000j')
        self.assertEqual(format(complex(INF, INF), 'F'), 'INF+INFj')
        self.assertEqual(format(complex(1, INF), 'F'), '1.000000+INFj')
        self.assertEqual(format(complex(INF, 1), 'F'), 'INF+1.000000j')
        self.assertEqual(format(complex(INF, -1), 'F'), 'INF-1.000000j')

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

${this.title}

Code Editor : test_complex.py