Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:

(2) is not a tuple. It is just a number 2. To make a tuple containing a single 
item you need to use special syntax: add a comma to that item. Parenthesis are 
optional.

>>> (2)
2
>>> (2,)
(2,)
>>> 2,
(2,)

----------
nosy: +serhiy.storchaka
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42510>
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