[issue15467] Updating __sizeof__ tests

[Serhiy Storchaka]

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

Can we get around this by renaming check_sizeof into _check_sizeof? Or would 
we have to duplicate these auxiliary functions in every test file with 
__sizeof__ test?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15467>
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