Terry Reedy wrote:
In particular, built-in functions, in spite of of being labeled
'builtin_function_or_method', are not usable as methods because they
lack the __get__ method needed to bind function to instance.
They're not usable as Python-level instance methods, but they're
definitely usable as methods, since they're used to implement methods
for built-in types.
I'm probably missing something, but I don't think there's a convenient
method to get the internal function from a built-in type. However, you
can find traces of them here and there:
>>> "".upper.hello
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'builtin_function_or_method' object has no attribute 'hello'
>>> "".upper.__call__
<method-wrapper '__call__' of builtin_function_or_method object at
0x00C06260>
etc.
</F>
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