[issue33835] Too strong side effect?

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

See https://docs.python.org/3/faq/programming.html#why-did-changing-list-y-also-change-list-x .

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<https://bugs.python.org/issue33835>
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