How Can I Split a Python String Using Multiple Delimiters?

Splitting Strings with Multiple Delimiters in Python

You need to split a string into multiple segments using either a semicolon (;) or a comma followed by a space (', '). Regular expressions can be useful for solving this problem.

Pythonic Solution

Thankfully, Python offers a built-in solution:

import re

delimiters = '; |, '
split_string = re.split(delimiters, string_to_split)

re.split() splits the string based on the pattern provided in the delimiters variable. This pattern includes both the semicolon and comma with trailing space.

Example:

Consider the 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]"

Splitting this string using the Pythonic solution yields:

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

Handling Multiple Delimiters

You can split on multiple delimiters by providing a pipe (|) between them in the regular expression pattern. For instance, to split on a comma or asterisk (*), modify the delimiters variable as follows:

delimiters = '; |, |*|\n'

This would then split the following string:

"Beautiful, is; better*than\nugly"

Into:

['Beautiful', 'is', 'better', 'than', 'ugly']

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