Extended zip() for lists

[Florian Reiser]

Hello,

I have 4 lists: a, b, c and d
Out of this 4 lists I want to build a table (e.g. list of lists):

a|b|c|d
---------------------------
a1|b1|c1|d1
a1|b2| |d2

You see: the lists are not equally sized.
Is there a command which fills up the shorter lists with blanks?
Like an enhanced zip() command, maybe?

Regards
Florian Reiser

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[gene tani]

Re: Extended zip() for lists


Florian Reiser wrote:[color=blue]
> Hello,
>
> I have 4 lists: a, b, c and d
> Out of this 4 lists I want to build a table (e.g. list of lists):
>
> a|b|c|d
> ---------------------------
> a1|b1|c1|d1
> a1|b2| |d2
>
> You see: the lists are not equally sized.
> Is there a command which fills up the shorter lists with blanks?
> Like an enhanced zip() command, maybe?
>[/color]

map(None, list1, list2, list3)

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/410687

[Fredrik Lundh]

Re: Extended zip() for lists

Florian Reiser wrote:
[color=blue]
> I have 4 lists: a, b, c and d
> Out of this 4 lists I want to build a table (e.g. list of lists):
>
> a|b|c|d
> ---------------------------
> a1|b1|c1|d1
> a1|b2| |d2
>
> You see: the lists are not equally sized.
> Is there a command which fills up the shorter lists with blanks?
> Like an enhanced zip() command, maybe?[/color]

like map(None, ...), perhaps ?
[color=blue][color=green][color=darkred]
>>> a = "1234"
>>> b = "12"
>>> c = "123"
>>> d = "1234"
>>> zip(a, b, c, d)[/color][/color][/color]
[('1', '1', '1', '1'), ('2', '2', '2', '2')][color=blue][color=green][color=darkred]
>>> map(None, a, b, c, d)[/color][/color][/color]
[('1', '1', '1', '1'), ('2', '2', '2', '2'), ('3', None, '3', '3'),
('4', None, None, '4')]

</F>

[Duncan Booth]

Re: Extended zip() for lists

Florian Reiser wrote:
[color=blue]
> Hello,
>
> I have 4 lists: a, b, c and d
> Out of this 4 lists I want to build a table (e.g. list of lists):
>
> a|b|c|d
> ---------------------------
> a1|b1|c1|d1
> a1|b2| |d2
>
> You see: the lists are not equally sized.
> Is there a command which fills up the shorter lists with blanks?
> Like an enhanced zip() command, maybe?
>
> Regards
> Florian Reiser
>[/color]

I posted a function to do this back in January. See:

http://groups.google.co.uk/group/comp.lang.python/browse_frm/thread/f424f63bfdb77c4/88d1541e632adfdd?lnk=st&rnum=1#88d1541e632adfdd

[Florian Reiser]

Re: Extended zip() for lists

Hello Gene,

a big THANKS for this tip. This is exactly what I was looking for.

Regards

Florian Reiser

"gene tani" <gene.tani@gmai l.com> schrieb im Newsbeitrag
news:1149772973 .297794.68720@i 39g2000cwa.goog legroups.com...[color=blue]
>
> Florian Reiser wrote:[color=green]
>> Hello,
>>
>> I have 4 lists: a, b, c and d
>> Out of this 4 lists I want to build a table (e.g. list of lists):
>>
>> a|b|c|d
>> ---------------------------
>> a1|b1|c1|d1
>> a1|b2| |d2
>>
>> You see: the lists are not equally sized.
>> Is there a command which fills up the shorter lists with blanks?
>> Like an enhanced zip() command, maybe?
>>[/color]
>
> map(None, list1, list2, list3)
>
> http://aspn.activestate.com/ASPN/Coo.../Recipe/410687
>[/color]