Splitting strings in Python using specific characters

Question

I\'m trying to split an inputted document at specific characters. I need to split them at [ and ] but I\'m having a difficult time figuring this out.

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Answer 1

str.split() splits at the exact string you pass to it, not at any of its characters. Passing "[]" would split at occurrences of [], but not at individual brackets. Possible solutions are

1. splitting twice:

   words = [z for y in x.split("[") for z in y.split("]")]
   

2. using re.split().

Answer 2

You could try using re.split() instead:

>>> import re
>>> re.split(r"[\[\]]", "I need to [go out] to lunch")
['I need to ', 'go out', ' to lunch']

The odd-looking regular expression [\[\]] is a character class that means split on either [ or ]. The internal \[ and \] must be backslash-escaped because they use the same characters as the [ and ] to surround the character class.

Answer 3

string.split(s), the one you are using, treats the entire content of 's' as a separator. In other words, you input should've looked like "[]'I need to []go out[] to lunch', 'and eat []some food[].'[]" for it to give you the results you want.

You need to use split(s) from the re module, which will treat s as a regex

import re

def main():
for x in docread:
    words = re.split('[]', x)
    for word in words:
        doclist.append(word)