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gh-108751: Add copy.replace() function (GH-108752)

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It creates a modified copy of an object by calling the object's
__replace__() method.

It is a generalization of dataclasses.replace(), named tuple's _replace()
method and replace() methods in various classes, and supports all these
stdlib classes.
This commit is contained in:
Serhiy Storchaka 2023-09-06 23:55:42 +03:00 • committed by GitHub
parent 9f0c0a46f0
commit 6f3c138dfa
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19 changed files with 311 additions and 68 deletions
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7
Lib/test/test_code.py
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@ -125,6 +125,7 @@
"""
import copy
import inspect
import sys
import threading
@ -280,11 +281,17 @@ def func2():
with self.subTest(attr=attr, value=value):
new_code = code.replace(**{attr: value})
self.assertEqual(getattr(new_code, attr), value)
new_code = copy.replace(code, **{attr: value})
self.assertEqual(getattr(new_code, attr), value)
new_code = code.replace(co_varnames=code2.co_varnames,
co_nlocals=code2.co_nlocals)
self.assertEqual(new_code.co_varnames, code2.co_varnames)
self.assertEqual(new_code.co_nlocals, code2.co_nlocals)
new_code = copy.replace(code, co_varnames=code2.co_varnames,
co_nlocals=code2.co_nlocals)
self.assertEqual(new_code.co_varnames, code2.co_varnames)
self.assertEqual(new_code.co_nlocals, code2.co_nlocals)
def test_nlocals_mismatch(self):
def func():