PEP 616 String methods to remove prefixes and suffixes

See also

• https://www.python.org/dev/peps/pep-0616/

• https://docs.python.org/3.9/whatsnew/3.9.html#pep-616-new-removeprefix-and-removesuffix-string-methods

Articles

https://martinheinz.dev

math module is not the only one that got some new functions. Two new convenience functions for strings were added too:

removeprefix

# Remove prefix
"someText".removeprefix("some")
# "Text"

removesuffix

# Remove suffix
"someText".removesuffix("Text")
# "some"

These 2 functions perform what you would otherwise achieve using string[len(prefix):] for prefix and string[:-len(suffix)] for suffix.

These are very simple operations and therefore also very simple functions, but considering that you might perform these operations quite often, it’s nice to have built-in function that does it for you.