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"""Code for compatibility across Python versions."""
import sys
import warnings
from imp import find_module as original_find_module
IS_PYTHON3 = sys.version_info >= (3, 0)
if IS_PYTHON3:
def find_module(fullname, path):
"""Compatibility wrapper for imp.find_module.
Automatically decodes arguments of find_module, in Python3
they must be Unicode
"""
if isinstance(fullname, bytes):
fullname = fullname.decode()
if isinstance(path, bytes):
path = path.decode()
elif isinstance(path, list):
newpath = []
for element in path:
if isinstance(element, bytes):
newpath.append(element.decode())
else:
newpath.append(element)
path = newpath
return original_find_module(fullname, path)
# There is no 'long' type in Python3 just int
long = int
unicode_errors_default = 'surrogateescape'
else:
find_module = original_find_module
unicode_errors_default = 'ignore'
NUM_TYPES = (int, long, float)
def check_async(async_, kwargs, default):
"""Return a value of 'async' in kwargs or default when async_ is None.
This helper function exists for backward compatibility (See #274).
It shows a warning message when 'async' in kwargs is used to note users.
"""
if async_ is not None:
return async_
elif 'async' in kwargs:
warnings.warn(
'"async" attribute is deprecated. Use "async_" instead.',
DeprecationWarning,
)
return kwargs.pop('async')
else:
return default
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