81 lines
2.3 KiB
Python
81 lines
2.3 KiB
Python
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from __future__ import absolute_import
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import inspect
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from django.utils import six
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def getargspec(func):
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if six.PY2:
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return inspect.getargspec(func)
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sig = inspect.signature(func)
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args = [
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p.name for p in sig.parameters.values()
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if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD
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]
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varargs = [
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p.name for p in sig.parameters.values()
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if p.kind == inspect.Parameter.VAR_POSITIONAL
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]
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varargs = varargs[0] if varargs else None
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varkw = [
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p.name for p in sig.parameters.values()
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if p.kind == inspect.Parameter.VAR_KEYWORD
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]
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varkw = varkw[0] if varkw else None
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defaults = [
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p.default for p in sig.parameters.values()
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if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD and p.default is not p.empty
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] or None
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return args, varargs, varkw, defaults
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def get_func_args(func):
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if six.PY2:
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argspec = inspect.getargspec(func)
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return argspec.args[1:] # ignore 'self'
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sig = inspect.signature(func)
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return [
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arg_name for arg_name, param in sig.parameters.items()
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if param.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD
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]
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def func_accepts_kwargs(func):
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if six.PY2:
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# Not all callables are inspectable with getargspec, so we'll
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# try a couple different ways but in the end fall back on assuming
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# it is -- we don't want to prevent registration of valid but weird
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# callables.
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try:
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argspec = inspect.getargspec(func)
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except TypeError:
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try:
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argspec = inspect.getargspec(func.__call__)
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except (TypeError, AttributeError):
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argspec = None
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return not argspec or argspec[2] is not None
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return any(
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p for p in inspect.signature(func).parameters.values()
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if p.kind == p.VAR_KEYWORD
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)
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def func_has_no_args(func):
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args = inspect.getargspec(func)[0] if six.PY2 else [
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p for p in inspect.signature(func).parameters.values()
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if p.kind == p.POSITIONAL_OR_KEYWORD and p.default is p.empty
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]
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return len(args) == 1
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def func_supports_parameter(func, parameter):
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if six.PY3:
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return parameter in inspect.signature(func).parameters
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else:
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args, varargs, varkw, defaults = inspect.getargspec(func)
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return parameter in args
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