Interestingly the Python standard library behaves similarly (on Python 3.9.2): >>> import ipaddress >>> ipaddress.ip_address('010.0.0.1').is_private True

Interestingly the Python standard library behaves similarly (on Python 3.9.2): >>> import ipaddress >>> ipaddress.ip_address('010.0.0.1').is_private True Even though the documentation claims that "Leading zeroes are tolerated only for values less than 8 (as there is no ambiguity between the decimal and octal interpretations of such strings)." https://docs.python.org/3.9/library/ipaddress.html#ipaddress.IPv4Address https://docs.python.org/3.9/library/ipaddress.html#ipaddress...