Dumb Stupid Question About List and String

Shashwat Anand anand.shashwat at gmail.com
Tue Aug 31 21:44:22 CEST 2010


On Wed, Sep 1, 2010 at 12:27 AM, Alban Nona <python.koda at gmail.com> wrote:

> Hi all,
>
> Im stuck on this problem:
> I have a function which return me a list of string (basically the result
> looks like: ["FN067_098_MEN", FN067_098_JIN", FN067_098_BG"]
> In other hand, I have another list full of that kind of entries:
>
> ["FN067_098_MEN_Hair_PUZ_v001.0001.exr","FN067_098_JIN_Hair_SPC_v001.0001.exr","FN067_098_MEN_Jin_MVE_v001.0001.exr","FR043_010_GEN_NRM_v001.0001.exr"]
>
> I would like to do something like this:
>
> myFirstList = ["FN067_098_MEN", FN067_098_JIN", FN067_098_BG"]
> mySecondList =
> ["FN067_098_MEN_Hair_PUZ_v001.0001.exr","FN067_098_JIN_Hair_SPC_v001.0001.exr","FN067_098_MEN_Jin_MVE_v001.0001.exr","FR043_010_GEN_NRM_v001.0001.exr"]
>
> for n in myFirstList:
>     if n in mySecondList:
>         mySecondList.remove(n)
>
> In fact, what I want to do it to remove entries with the secondlist which
> content the entries of the first one. But it seems to not work like this.
> Someone can help me please ? did I miss something ?
>

You can try this if you don't care about the order.

>>> myFirstList = ["FN067_098_MEN", "FN067_098_JIN", "FN067_098_BG"]
>>> mySecondList =
["FN067_098_MEN_Hair_PUZ_v001.0001.exr","FN067_098_JIN_Hair_SPC_v001.0001.exr","FN067_098_MEN_Jin_MVE_v001.0001.exr","FR043_010_GEN_NRM_v001.0001.exr"]
>>> list(set(mySecondList).difference(myFirstList))
['FN067_098_MEN_Jin_MVE_v001.0001.exr',
'FN067_098_MEN_Hair_PUZ_v001.0001.exr', 'FR043_010_GEN_NRM_v001.0001.exr',
'FN067_098_JIN_Hair_SPC_v001.0001.exr']

Another example to make this clear.
>>> a = range(10)
>>> b = range(5,15)
>>> a
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> b
[5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
>>> list(set(b).difference(a))
[10, 11, 12, 13, 14]


-- 
~l0nwlf
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