Stackoverflow question: Is there a built-in identity function in Python?
Ben Finney
ben+python at benfinney.id.au
Thu Dec 7 18:43:28 EST 2017
Nathan Ernst <nathan.ernst at gmail.com> writes:
> There is a built-in identity function in Python. The function is called
> 'id'.
It should be clear from the rest of the thread. But, to be explicit:
That's not what is meant by “identity function”, and the Python ‘id’
function is not an identity function.
The Python ‘id’ function returns the “identity of the object”, a
Python-specific concept that is unrelated to the identity function.
An “identity function” is mathematics terminology for “a function that
always returns the same value that was used as its argument.”
<URL:https://en.wikipedia.org/wiki/Identity_function>
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Ben Finney
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