[Python-Dev] PEP 3144 review. (original) (raw)

Eric Smith eric at trueblade.com
Wed Sep 16 03:02:01 CEST 2009

Antoine Pitrou wrote:

Peter Moody <peter hda3.com> writes:

However, I do not think that the proposed API should accept, eg, IPv4Network('192.168.1.1/24') as valid. That's just too confusing and error prone. Indeed, it should throw some kind of ValueError instead. Peter, what do you think? I disagree. It seems overly pedantic to throw a valueerror on this. IPy does (used to do?) this and it's one of the primary reasons I wrote ipaddr. Python is not PHP and does not try to be overly "smart" or tolerant when faced with bizarrely-formatted input. I don't see any valid reason for entering a network as "192.168.1.1/24" rather than the canonical "192.168.1.0/24". The former might indicate a typing error or a mental slip, so let's be helpful and signal it to the user.

I completely agree. I don't know of any situation where I'd want a network of "192.168.1.1/24" to be anything other than an error.

Eric.

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