CODEWITHSUNDEEP
pythonpython-3.xnetwork-programming
planetp
planetp

Reputation: 16115

Sorting a list of IPv4Network and IPv6Network objects

I have a list of IPv4 and IPv6 networks created with ipaddress.ip_network(), which I want to sort (by family first, then value). What would be the best way to do this? Apparently, a naive sort doesn't work:

>>> from ipaddress import ip_network
>>> L = [ip_network(x) for x in ['ff00::/8', 'fd00::/8', '172.16.0.0/12', '10.0.0.0/8']]
>>> L.sort()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.5/ipaddress.py", line 652, in __lt__
    self, other))
TypeError: 10.0.0.0/8 and fd00::/8 are not of the same version

Upvotes: 3

Views: 602

Answers (1)

Eugene Yarmash
Eugene Yarmash

Reputation: 149963

Just use a key function that would allow to compare the values by type first, something like:

>>> from ipaddress import ip_network, IPv6Network
>>> L = [ip_network(x) for x in ['ff00::/8', 'fd00::/8', '172.16.0.0/12', '10.0.0.0/8']]
>>> L.sort(key=lambda x: (isinstance(x, IPv6Network), x))
>>> L
[IPv4Network('10.0.0.0/8'), IPv4Network('172.16.0.0/12'), IPv6Network('fd00::/8'), IPv6Network('ff00::/8')]

Upvotes: 4

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