Remove whitespace from the Python list

Question

I’m reading a file, stopwords.txt, and in this file each stopword is on a line, example:

a


o


para

Each stopword I am saving on a list as follows:

with open(sys.argv[1],"r") as file_entrada: 
    lista_nome_base_docs = [line.rstrip() for line in file_entrada]


with open(sys.argv[2],"r") as file_stopwords:  
    lista_stopwords = [line.strip() for line in file_stopwords]

After this reading, I have the list displayed on the screen and exit this way

Among the stopwords, is coming out a white space, example: ['a','','para']

How do I not show these whitespaces in the list?

Answer 1

Just check when you generate the word list:

lista_stopwords = [line.strip() for line in file_stopwords if line.strip() != ""]

Notice the addition of the condition if line.strip() != "" at the end of the line. With this you will already ensure that only lines with some content other than line break are not included in the list.

Take an example:

words = ["a\n", "\n", "ok\n", "\n", ""]

print([word.strip() for word in words if word.strip() != ""])

# ['a', 'ok']

^{See working on Ideone | Repl.it}