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utils.py
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170 lines (129 loc) · 4.59 KB
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# -*- coding: utf-8 -*-
import os
import sys
import six
import time
import uuid
import socket
import inspect
import hashlib
import platform
import threading
import traceback
if sys.version_info.major > 2:
from traceback import format_exception_only
else:
from _compat import format_exception_only
def md5(*args):
m = hashlib.md5()
for arg in args:
part = arg.encode('utf-8')
m.update(part)
return m.hexdigest()
def uuid4():
return str(uuid.uuid4())
def now():
return int(round(1000 * time.time()))
def platform_label():
major_version, _, __ = platform.python_version_tuple()
implementation = platform.python_implementation()
return '{implementation}{major_version}'.format(implementation=implementation.lower(),
major_version=major_version)
def thread_tag():
return '{0}-{1}'.format(os.getpid(), threading.current_thread().name)
def host_tag():
return socket.gethostname()
def represent(item):
"""
>>> represent(None)
'None'
>>> represent(123)
'123'
>>> from sys import version_info
>>> expected = u"'hi'" if version_info.major < 3 else "'hi'"
>>> represent('hi') == expected
True
>>> from sys import version_info
>>> expected = u"'привет'" if version_info.major < 3 else "'привет'"
>>> represent(u'привет') == expected
True
>>> represent(bytearray([0xd0, 0xbf])) # doctest: +ELLIPSIS
"<... 'bytearray'>"
>>> from struct import pack
>>> result = "<type 'str'>" if version_info.major < 3 else "<class 'bytes'>"
>>> represent(pack('h', 0x89)) == result
True
>>> result = "<type 'int'>" if version_info.major < 3 else "<class 'int'>"
>>> represent(int) == result
True
>>> represent(represent) # doctest: +ELLIPSIS
'<function represent at ...>'
>>> represent([represent]) # doctest: +ELLIPSIS
'[<function represent at ...>]'
>>> class ClassWithName(object):
... pass
>>> represent(ClassWithName)
"<class 'utils.ClassWithName'>"
"""
if sys.version_info.major < 3 and isinstance(item, str):
try:
item = item.decode(encoding='UTF-8')
except UnicodeDecodeError:
pass
if isinstance(item, six.text_type):
return u'\'%s\'' % item
elif isinstance(item, (bytes, bytearray)):
return repr(type(item))
else:
return repr(item)
def func_parameters(func, *a, **kw):
bowels = inspect.getargspec(func) if sys.version_info.major < 3 else inspect.getfullargspec(func)
args_dict = dict(zip(bowels.args, map(represent, a)))
kwargs_dict = dict(zip(kw, list(map(lambda i: represent(kw[i]), kw))))
kwarg_defaults = dict(zip(reversed(bowels.args), reversed(list(map(represent, bowels.defaults or ())))))
kwarg_defaults.update(kwargs_dict)
return args_dict, kwarg_defaults
def format_traceback(exc_traceback):
return ''.join(traceback.format_tb(exc_traceback)) if exc_traceback else None
def format_exception(etype, value):
"""
>>> import sys
>>> try:
... assert False, u'Привет'
... except AssertionError:
... etype, e, _ = sys.exc_info()
... format_exception(etype, e) # doctest: +ELLIPSIS
'AssertionError: ...\\n'
>>> try:
... assert False, 'Привет'
... except AssertionError:
... etype, e, _ = sys.exc_info()
... format_exception(etype, e) # doctest: +ELLIPSIS
'AssertionError: ...\\n'
>>> try:
... compile("bla u'Привет'", "fake.py", "exec")
... except SyntaxError:
... etype, e, _ = sys.exc_info()
... format_exception(etype, e) # doctest: +ELLIPSIS
' File "fake.py", line 1...SyntaxError: invalid syntax\\n'
>>> try:
... compile("bla 'Привет'", "fake.py", "exec")
... except SyntaxError:
... etype, e, _ = sys.exc_info()
... format_exception(etype, e) # doctest: +ELLIPSIS
' File "fake.py", line 1...SyntaxError: invalid syntax\\n'
>>> from hamcrest import assert_that, equal_to
>>> try:
... assert_that('left', equal_to('right'))
... except AssertionError:
... etype, e, _ = sys.exc_info()
... format_exception(etype, e) # doctest: +ELLIPSIS
"AssertionError: \\nExpected:...but:..."
>>> try:
... assert_that(u'left', equal_to(u'right'))
... except AssertionError:
... etype, e, _ = sys.exc_info()
... format_exception(etype, e) # doctest: +ELLIPSIS
"AssertionError: \\nExpected:...but:..."
"""
return '\n'.join(format_exception_only(etype, value))