Bug 528238 – >=dev-lang/python 3.3 - IPv6Network constructor does not recognize legitimate netmask

• Status: RESOLVED UPSTREAM
• Product: Gentoo Linux

[Description Chris PeBenito 2014-11-04 16:44:31 UTC]

Python 3.3+ sometimes does not recognize a legitimate IPv6Network netmask:

$ python3
Python 3.3.5 (default, May 28 2014, 13:56:57) 
[GCC 4.7.3] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ipaddress as ip
>>> nodecon = ip.IPv6Network('ff00::/ff00::')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.3/ipaddress.py", line 2084, in __init__
    self._prefixlen = self._prefix_from_prefix_string(addr[1])
  File "/usr/lib64/python3.3/ipaddress.py", line 514, in _prefix_from_prefix_string
    self._report_invalid_netmask(prefixlen_str)
  File "/usr/lib64/python3.3/ipaddress.py", line 497, in _report_invalid_netmask
    raise NetmaskValueError(msg) from None
ipaddress.NetmaskValueError: 'ff00::' is not a valid netmask
>>> nodecon = ip.IPv6Network('ff00::/8')
>>> print(nodecon)
ff00::/8
>>> print(nodecon.with_netmask)
ff00::/ff00::

I get the same behavior on Python 3.4.2.

[Comment 1 Arfrever Frehtes Taifersar Arahesis 2014-11-05 03:59:07 UTC]

Such problems should be reported in https://bugs.python.org/

[Comment 2 Dirkjan Ochtman (RETIRED) 2014-11-05 14:14:31 UTC]

This is an upstream bug, please file there.