Fwd: Is there a function of ipaddress to get the subnet only from input like 192.168.1.129/25

[Nathan Hilterbrand]

Absolutely, Stefan!  I like yours a lot better.  I am an old perl hack that
is still learning the ins and outs of Python, and this is just the sort of
thing that I like to see.

Thanks!

On Tue, Oct 17, 2017 at 4:19 PM, Stefan Ram <ram at zedat.fu-berlin.de> wrote:

> Nathan Hilterbrand <nhilterbrand at gmail.com> writes:
> >I may have misunderstood what you were looking for, but went ahead and
> >cobbled this ugly function together.  Takes a string like "
> 192.168.1.128/25"
> >as input, and returns the subnet address.  Just slapped together, so not
> >the most robust thing in the world
>
>   The IP address of the OP has some so-called "host bits" set.
>   Therefore, it might not be considered to be a valid subnet
>   specification by some parties.
>
>   Your code seems to have the intention to remove those
>   disturbing host bits. You did this using a bit mask.
>   It might also be possible to accomplish the same by
>   a right shift plus a left shift, e.g.,
>
> |>>> IPv4Address( int( IPv4Address( '192.168.1.129' ))>> 25 << 25 )
> |IPv4Address('192.0.0.0')
>
>   .
>
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