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bpo-36542: Allow to overwrite the signature for Python functions. (GH-12705)

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Serhiy Storchaka 2019-05-06 22:40:27 +03:00 • committed by GitHub
parent 96aeaec647
commit d53cf99dca
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GPG key ID: 4AEE18F83AFDEB23
17 changed files with 40 additions and 3 deletions
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9
Lib/inspect.py
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@ -2121,7 +2121,7 @@ def _signature_from_builtin(cls, func, skip_bound_arg=True):
return _signature_fromstr(cls, func, s, skip_bound_arg)
def _signature_from_function(cls, func):
def _signature_from_function(cls, func, skip_bound_arg=True):
"""Private helper: constructs Signature for the given python function."""
is_duck_function = False
@ -2133,6 +2133,10 @@ def _signature_from_function(cls, func):
# of pure function:
raise TypeError('{!r} is not a Python function'.format(func))
s = getattr(func, "__text_signature__", None)
if s:
return _signature_fromstr(cls, func, s, skip_bound_arg)
Parameter = cls._parameter_cls
# Parameter information.
@ -2301,7 +2305,8 @@ def _signature_from_callable(obj, *,
if isfunction(obj) or _signature_is_functionlike(obj):
# If it's a pure Python function, or an object that is duck type
# of a Python function (Cython functions, for instance), then:
return _signature_from_function(sigcls, obj)
return _signature_from_function(sigcls, obj,
skip_bound_arg=skip_bound_arg)
if _signature_is_builtin(obj):
return _signature_from_builtin(sigcls, obj,