[issue41820] ipaddress Library gives me incorrect results
New submission from Anudeep Balla :
https://docs.python.org/3.8/library/ipaddress.html
import ipaddress
ADDRESSES = [
'172.16.254.00'
]
for ip in ADDRESSES:
addr = ipaddress.ip_address(ip)
if addr.version==4:
{
print("true")
}
else:
{
print("false")
}
Screen Shot 2020-09-20 at 1 33 30 AM
I tried to validate an invalid IPv4 address using IPaddress library from py
3.8.6 but somehow it considers any address ending with "00" to be valid.
I hope this is helpful to the community please let me know if the issue is with
validation from your end or a bug in the library.
@AnudeepBalla
--
components: Library (Lib)
messages: 377208
nosy: anudeepballa07
priority: normal
severity: normal
status: open
title: ipaddress Library gives me incorrect results
type: behavior
versions: Python 3.8
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[issue41820] ipaddress Library gives me incorrect results
Anudeep Balla added the comment: That was the whole point I was trying to make that there were no references that state .00 is equivalent to .0 and if you would try any IP validator or would check by any means you would find that the IP address is invalid. I truly understand the point that you are trying to make but if my program says a invalid IP address as valid I don't see how that helps. I have checked almost every online IP validators to give me the same INVALID as result for 172.16.254.00 while they say 172.16.254.0 is VALID. On Sun, 20 Sep 2020 at 12:04, Eric V. Smith wrote: > > Eric V. Smith added the comment: > > Please do not include screen shots in bug reports. They've unfriendly to > people who use screen readers or other accessibility software. Instead, > please copy and paste (or retype, if needed) the text into the comment > section. > > > '172.16.254.00' *is not* equivalent to '172.16.254.0' > > Do you have an RFC or other document that makes that clear? I've never > seen an IP address library that makes a distinction between '00' and '0'. > But I'm happy to learn something new, if you can point to a standard. > > If this were going to be an error, it would be in the call to > ipaddress.ip_address() or its equivalent. It would raise ValueError, like > it does for other strings that don't represent valid addresses. But for > backward compatibility reasons, unless there's a standard that explicitly > disallows .00, I doubt we'd change the code to raise an exception. And even > if there were a standard that says .00 is not a valid address, I'd be > reluctant to make a change here. We could potentially break people's code, > and we'd need a very good reason to do that. > > Also, is this causing you a practical problem? Is there somewhere you're > getting a .00 address and you'd like to treat it as being invalid? > > -- > > ___ > Python tracker > <https://bugs.python.org/issue41820> > ___ > -- ___ Python tracker <https://bugs.python.org/issue41820> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue41820] ipaddress Library gives me incorrect results
Anudeep Balla added the comment:
Greetings,
Any Ip address containing 2 zeros or more are considered to be an invalid
IP address.
'172.16.254.00' *is not* equivalent to '172.16.254.0'
I guess this small logic is causing the error
I hope it makes it clear from the below images.
Regards,
Raj.
[image: Screen Shot 2020-09-20 at 11.42.39 AM.png]
[image: Screen Shot 2020-09-20 at 11.42.31 AM.png]
[image: Screen Shot 2020-09-20 at 11.42.18 AM.png]
[image: Screen Shot 2020-09-20 at 11.42.09 AM.png]
On Sun, 20 Sep 2020 at 08:00, Eric V. Smith wrote:
>
> Eric V. Smith added the comment:
>
> Simplified:
> >>> import ipaddress
> >>> print(ipaddress.ip_address('172.16.254.00').version)
> 4
>
> So your concern is that you think '172.16.254.00' (or equivalently,
> '172.16.254.0') shouldn't be treated as a valid IPv4 address. Is that
> correct?
>
> Can you tell us why you think it's not a valid IPv4 address? I think
> everything is working correctly here.
>
> --
> nosy: +eric.smith
>
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> <https://bugs.python.org/issue41820>
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Added file: https://bugs.python.org/file49465/Screen Shot 2020-09-20 at
11.42.31 AM.png
Added file: https://bugs.python.org/file49466/Screen Shot 2020-09-20 at
11.42.39 AM.png
Added file: https://bugs.python.org/file49467/Screen Shot 2020-09-20 at
11.42.18 AM.png
Added file: https://bugs.python.org/file49468/Screen Shot 2020-09-20 at
11.42.09 AM.png
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