no tuple.copy()

[buran]

it's immutable. why would you need a copy? Reference is good enough.
there is no e.g. str.copy either :-)

Note that with [:] it's the same object (same id), not a copy

Python 3.9.4 (default, Apr  9 2021, 01:15:05) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> spam = (1, 2, 3)
>>> eggs = spam[:]
>>> id(spam)
139751983214912
>>> id(eggs)
139751983214912
>>>