[Tutor] Splitting lists with strings and integers

[Dominik George]

Hi,

> I have a list with mixed strings/integers.  I want to convert this to a
> list of lists, and I want the numbers to get stored as integers.

First, let's do it with a list comprehension. You should really learn those if you do serious Python programming ;)!

   list2 = [[int(z) if z.isdigit() else z for z in y] for y in [x.split(" ") for x in list1]]

Now, to convert every possible numeric string in a list to int in a more
readable fashion:

   for x in xrange(len(animal)):
       if animal[x].isdigit():
           animal[x] = int(animal[x])

So:

 - the isdigit() method of a string tells you if it is numeric
 - int() casts to an integer

The list comprehension does the whole converion with list
comprehensions. You should consider readability when doing such things,
but you should learn it.

-nik           

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