Removing leading whitespace from a string

Hi I开发者_JS百科 have list of strings in python

[" 0", " 1", " 2"] 

and I want to remove the whitespace from the start of one of them.

How would I do this?

If you want to remove the whitespace from all of them, you could use

a = [" 0", " 1", " 2"]
b = [s.lstrip() for s in a]

If you really only want to strip one of them, use

a[i] = a[i].lstrip()

where i is the index of the one you want to strip.

To remove the spaces you can use the strip method, then use the positional operator to access and assign that position on the list, for the element in position 0 you should do:

l[0] = l[0].strip()

boooooh...

li = [" 0", " 1", " 2"]
li = map(str.lstrip,li)

you can use lstrip() if you want to remove from start. Otherwise, you can use strip() to remove trailing and leading.

If you want the the result to be a list of intergers then try this

>>> w = [" 0", " 1" ," 2"]
>>> map(lambda a:eval(a),w)
[0, 1, 2]

else if you want it to be a list of string

>>> w = [" 0", " 1" ," 2"]
>>> map(lambda a:a.strip(),w)
['0', '1', '2']
>>>