How to remove empty string in a list?

You can filter it like this

orig = ["He", "is", "so", "", "cool"]
result = [x for x in orig if x]

Or you can use filter. In python 3 filter returns a generator, thus list() turns it into a list. This works also in python 2.7

result = list(filter(None, orig))

You can use filter, with None as the key function, which filters out all elements which are Falseish (including empty strings)

>>> lst = ["He", "is", "so", "", "cool"]
>>> filter(None, lst)
['He', 'is', 'so', 'cool']

Note however, that filter returns a list in Python 2, but a generator in Python 3. You will need to convert it into a list in Python 3, or use the list comprehension solution.

Falseish values include:

False
None
0
''
[]
()
# and all other empty containers

You can use a list comprehension:

cleaned = [x for x in your_list if x]

Although I would use regex to extract the words:

>>> import re
>>> sentence = 'This is some cool sentence with,    spaces'
>>> re.findall(r'(\w+)', sentence)
['This', 'is', 'some', 'cool', 'sentence', 'with', 'spaces']