How Can I Split Strings with Multiple Delimiters in Python Using Regular Expressions?

Splitting Strings with Multiple Delimiters in Python

Many tasks in programming involve manipulating strings. When working with strings containing multiple delimiters, such as semicolons and commas, splitting them efficiently is essential.

Using Regular Expressions

One common approach is to use regular expressions. Consider the 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]"

To split this string by either a semicolon or a comma followed by a space, we can use the following regular expression:

'; |, '

This pattern matches either a semicolon or a comma followed by a space. Using the re.split() function, we can split the string as follows:

import re

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

Note: Individual commas without trailing spaces will not be split.

Update: Extended Delimeter Pattern

The given solution can be further extended to include additional delimiters. For instance, to split the following string by semicolons, commas, asterisks, and newlines:

"Beautiful, is; better*than\nugly"

The regular expression would become:

'; |, |\*|\n'

Using the re.split() function as before:

re.split('; |, |\*|\n', 'Beautiful, is; better*than\nugly')

This would result in the following split result:

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

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