File size: 1,807 Bytes
2b06d1d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | import functools
import inspect
import warnings
string_types = (type(b""), type(""))
def warn_deprecation(text):
warnings.warn(text, category=DeprecationWarning, stacklevel=2)
def deprecated(reason):
"""
This is a decorator which can be used to mark functions
as deprecated. It will result in a warning being emitted
when the function is used.
"""
if isinstance(reason, string_types):
# The @deprecated is used with a 'reason'.
#
# .. code-block:: python
#
# @deprecated("please, use another function")
# def old_function(x, y):
# pass
def decorator(func1):
if inspect.isclass(func1):
fmt1 = f"Call to deprecated class {func1.__name__} ({reason})."
else:
fmt1 = f"Call to deprecated function {func1.__name__} ({reason})."
@functools.wraps(func1)
def new_func1(*args, **kwargs):
warn_deprecation(fmt1)
return func1(*args, **kwargs)
return new_func1
return decorator
elif inspect.isclass(reason) or inspect.isfunction(reason):
# The @deprecated is used without any 'reason'.
#
# .. code-block:: python
#
# @deprecated
# def old_function(x, y):
# pass
func2 = reason
if inspect.isclass(func2):
fmt2 = f"Call to deprecated class {func2.__name__}."
else:
fmt2 = f"Call to deprecated function {func2.__name__}."
@functools.wraps(func2)
def new_func2(*args, **kwargs):
warn_deprecation(fmt2)
return func2(*args, **kwargs)
return new_func2
else:
raise TypeError(repr(type(reason)))
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