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inspect: Add some comments in Parameter.__eq__ method
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@ -1905,6 +1905,17 @@ class Parameter:
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id(self), self.name)
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def __eq__(self, other):
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# NB: We deliberately do not compare '_partial_kwarg' attributes
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# here. Imagine we have a following situation:
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#
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# def foo(a, b=1): pass
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# def bar(a, b): pass
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# bar2 = functools.partial(bar, b=1)
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#
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# For the above scenario, signatures for `foo` and `bar2` should
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# be equal. '_partial_kwarg' attribute is an internal flag, to
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# distinguish between keyword parameters with defaults and
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# keyword parameters which got their defaults from functools.partial
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return (issubclass(other.__class__, Parameter) and
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self._name == other._name and
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self._kind == other._kind and
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