Python List – How to Remove Empty Strings

listpython

For example I have a sentence 

"He is so .... cool!"

Then I remove all the punctuation and make it in a list.

["He", "is", "so", "", "cool"]

How do I remove or ignore the empty string?

Best Answer

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
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