[issue37436] os.path.isfile() with big number cause OverflowError: fd is greater than maximum

[Zufu Liu]

Zufu Liu <zufuliu at 163.com> added the comment:

Please also consider following pieces of code.
They (value of int sub classes) can't be returned by fileno().

Python 3.8.0b1 (tags/v3.8.0b1:3b5deb0116, Jun  4 2019, 19:52:55) [MSC v.1916 64 bit (AMD64)] on win32
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>>> class MyInt(int):pass
...
>>> a=MyInt(6)
>>> a
6
>>> import os.path
>>> os.path.isfile(a)
False
>>> os.path.isfile(True)
False
>>> os.path.isfile(False)
False
>>>

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<https://bugs.python.org/issue37436>
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