python regex expression image format

I want to limit formatting.

  • The length is 20
  • the name does not contain special characters. like *,'%$^&.@#!~
  • The image format is jpg, jpeg, png, gif, bmp, and webp

so i tried, I wrote it as below. However, I don't know to exclude special symbols. Help me bro!


2 answers

  • answered 2021-11-29 03:50 aziz k'h

    if you want only file name to be with length 20 (without include extension) :




  • answered 2021-11-29 07:53 The fourth bird

    You can exclude what you want to allow to match using a negated character class, and repeat that 1-19 times if you want to make it less than 20 characters.


    Regex demo

How many English words
do you know?
Test your English vocabulary size, and measure
how many words do you know
Online Test
Powered by Examplum