New submission from wyz23x2 <wyz2...@163.com>:
Doing this is generally very annoying:
y = x.copy()
y.some_method()
Sometimes x doesn't have copy(), so:
from copy import deepcopy
y = deepcopy(x)
y.some_method()
So maybe a function could be added to help.
For example:
def apply(obj, function, /, args=(), kwargs={}):
try:
new = obj.copy()
except AttributeError:
from copy import copy
new = copy(obj)
function(new, *args, **kwargs)
return new
# implement reversed() for list
lis = [1, 2, 3, 4, 5]
arr = apply(lis, list.reverse)
print(arr) # [5, 4, 3, 2, 1]
apply() maybe isn't the best name because of the builtin apply() in Python 2,
but that's EOL. It could be added in the standard library.
----------
components: Library (Lib)
messages: 383050
nosy: wyz23x2
priority: normal
severity: normal
status: open
title: Add function that supports "applying" methods
versions: Python 3.10
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42646>
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