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"""Code for compatibility across Python versions."""
import warnings
from typing import Any, Dict, Optional
def find_module(fullname, path): # type: ignore
"""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
from imp import find_module as original_find_module
return original_find_module(fullname, path)
unicode_errors_default = 'surrogateescape'
NUM_TYPES = (int, float)
def check_async(async_: Optional[bool], kwargs: Dict[str, Any], default: bool) -> bool:
"""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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