On 2022-06-08, 2qdxy4rzwzuui...@potatochowder.com
<2qdxy4rzwzuui...@potatochowder.com> wrote:
> On 2022-06-08 at 08:07:40 -0000,
> De ongekruisigde <ongekruisi...@news.eternal-september.org> wrote:
>
>> Depending on the problem a regular expression may be the much simpler
>> solution. I love them for e.g. text parsing and use them all the time.
>> Unrivaled when e.g. parts of text have to be extracted, e.g. from lines
>> like these:
>>
>> root:x:0:0:System administrator:/root:/run/current-system/sw/bin/bash
>> dhcpcd:x:995:991::/var/empty:/run/current-system/sw/bin/nologin
>> nm-iodine:x:996:57::/var/empty:/run/current-system/sw/bin/nologin
>> avahi:x:997:996:avahi-daemon privilege separation
>> user:/var/empty:/run/current-system/sw/bin/nologin
>> sshd:x:998:993:SSH privilege separation
>> user:/var/empty:/run/current-system/sw/bin/nologin
>> geoclue:x:999:998:Geoinformation
>> service:/var/lib/geoclue:/run/current-system/sw/bin/nologin
>>
>> Compare a regexp solution like this:
>>
>> >>> g = re.search(r'([^:]*):([^:]*):(\d+):(\d+):([^:]*):([^:]*):(.*)$' , s)
>> >>> print(g.groups())
>> ('geoclue', 'x', '999', '998', 'Geoinformation service',
>> '/var/lib/geoclue', '/run/current-system/sw/bin/nologin')
>>
>> to the code one would require to process it manually, with all the edge
>> cases. The regexp surely reads much simpler (?).
>
> Uh...
>
> >>> import pwd # https://docs.python.org/3/library/pwd.html
> >>> [x for x in pwd.getpwall() if x[0] == 'geoclue']
> [pwd.struct_passwd(pw_name='geoclue', pw_passwd='x', pw_uid=992,
> pw_gid=992, pw_gecos='Geoinformation service', pw_dir='/var/lib/geoclue',
> pw_shell='/sbin/nologin')]
Yeah... Well, it was just an example and it must be clear by now I'm not
a Python programmer.
--
<StevenK> You're rewriting parts of Quake in *Python*?
<knghtbrd> MUAHAHAHA
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