On 03/08/2015 15:30, Skip Montanaro wrote:
id() tells you nothing about the nature of the function. Use the
inspect.isbuiltin():
...
It's perhaps a bit poorly named, but "builtin" functions are those not
written in Python. That is, those written in C or C++.
I think in the documentation there is an inconsistency about the term
builtin. The "Built-in Functions" documentation says: """The Python
interpreter has a number of functions and types built into it that are
*always available*. They are listed here in
alphabetical order""".
https://docs.python.org/3/library/functions.html
The functions in the documentation list, are the same functions we get
from the `builtins` module.
So, in the documentation we use the term built-in to indicate functions
always available, whose names live in the builtin namespace.
Sometimes, as mentioned by Skip, we say that the term "buit-in function"
is also referred to a function written in C:
https://docs.python.org/3/library/types.html#types.BuiltinFunctionType
By using the same word (built-in) to indicate either objects written in
C or objects who live in the builtin namespace could be a bit muddler.
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Marco Buttu
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