Search code examples
pythonstringsplitdelimiter

Split string with multiple delimiters in Python

I found some answers online, but I have no experience with regular expressions, which I believe is what is needed here.

I have a string that needs to be split by either a ';' or ', ' That is, it has to be either a semicolon or a comma followed by a space. Individual commas without trailing spaces should be left untouched

Example string:

"b-staged divinylsiloxane-bis-benzocyclobutene [124221-30-3], mesitylene [000108-67-8]; polymerized 1,2-dihydro-2,2,4- trimethyl quinoline [026780-96-1]"

should be split into a list containing the following:

('b-staged divinylsiloxane-bis-benzocyclobutene [124221-30-3]' , 'mesitylene [000108-67-8]', 'polymerized 1,2-dihydro-2,2,4- trimethyl quinoline [026780-96-1]')
Solution

  • Luckily, Python has this built-in :)

    import re

# Regex pattern splits on substrings "; " and ", "
re.split('; |, ', string_to_split)

    Update:

    Following your comment:

    >>> string_to_split = 'Beautiful, is; better*than\nugly'
>>> import re
>>> re.split('; |, |\*|\n', string_to_split)
['Beautiful', 'is', 'better', 'than', 'ugly']