Logo

Programming-Idioms

# 344 Extract filename extension
Assign to ext the fragment of the string f after the last dot character, or the empty string if f does not contain a dot.

E.g. "photo.jpg" -> "jpg"

ext must not contain the dot character.
New implementation

Type ahead, or select one

Explain stuff

To emphasize a name: _x → x

Please be fair if you are using someone's work

You agree to publish under the CC-BY-SA License

Be concise.

Be useful.

All contributions dictatorially edited by webmasters to match personal tastes.

Please do not paste any copyright violating material.

Please try to avoid dependencies to third-party libraries and frameworks.

Other implementations 
import os
ext = os.path.splitext(f)[1][1:]

Preview