[Python-ideas] Add the method decorator
storchaka at gmail.com
Thu Apr 12 09:57:01 EDT 2018
There is a difference between functions implemented in Python and C.
Functions implemented in Python are descriptors. They can be used for
defining methods in Python classes. Functions implemented in C are not
descriptors. When set a class attribute to a functions implemented in C,
it will not become a bound method.
from _noddy import noddy_name
name = noddy_name
noddy = Noddy()
If noddy_name is a Python function, noddy.name() will call
noddy_name(noddy), but if it is a C function, noddy.name() will call
The same is true for classes and custom callables.
If a function is a descriptor, it can be converted into non-descriptor
function by wrapping it with the staticmethod decorator. I suggest to
add the method decorator, which converts an rbitrary callable into a
name = method(noddy_name)
This will help to implement only performance critical method of a class
in C. Currently you need to implement a base class in C, and inherit
Python class from C class. But this doesn't work when the class should
be inherited from other C class, or when an existing class should be
patched like in total_ordering.
This will help also to use custom callables as methods.
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