STINNER Victor <[email protected]> added the comment:
The same problem exists at the function level: see bpo-39805: "Copying
functions doesn't actually copy them".
For example, copy.deepcopy(func) returns func unchanged if it's a function.
Example:
---
import copy
def make_closure():
closure = []
def append(value):
closure.append(value)
return append, closure
func, closure = make_closure()
func(1)
func2 = copy.deepcopy(func)
func2(2)
print(func2 is func)
print(closure)
---
Output:
---
True
[1, 2]
---
----------
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Python tracker <[email protected]>
<https://bugs.python.org/issue47143>
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