What's the difference? docs show nothing on this, and their help() is identical. Is there an object for which isinstance will fail with one but not other?
LambdaType vs FunctionType
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2 Answers
Back in 1994 I wasn't sure that we would always be using the same implementation type for lambda and def. That's all there is to it. It would be a pain to remove it, so we're just leaving it (it's only one line). If you want to add a note to the docs, feel free to submit a PR.
See cpython/Lib/types.py:
def _f(): pass
FunctionType = type(_f)
LambdaType = type(lambda: None) # Same as FunctionType
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