Remove empty strings from a list of strings

I want to remove all empty strings from a list of strings in python.

My idea looks like this:

while '' in str_list:
    str_list.remove('')

Is there any more pythonic way to do this?

I would use filter:

str_list = filter(None, str_list)
str_list = filter(bool, str_list)
str_list = filter(len, str_list)
str_list = filter(lambda item: item, str_list)

Python 3 returns an iterator from filter, so should be wrapped in a call to list()

str_list = list(filter(None, str_list))

Using a list comprehension is the most Pythonic way:

>>> strings = ["first", "", "second"]
>>> [x for x in strings if x]
['first', 'second']

If the list must be modified in-place, because there are other references which must see the updated data, then use a slice assignment:

strings[:] = [x for x in strings if x]

filter actually has a special option for this:

filter(None, sequence)

It will filter out all elements that evaluate to False. No need to use an actual callable here such as bool, len and so on.

It's equally fast as map(bool, ...)

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