Character Groups Within Sets in Python Regular Expressions

The character groups \d, \D, \w, \W, \s, \S inside [] will denote precisely the groups, that is, they will still be commands.

Example

In this example, the search template looks like this: between the x's there is any number or letter from 'a' to 'f':

pythontxt = 'xax xbx x1x x2x xhx x@x'
res = re.sub('x[\da-f]x', '!', txt)

print(res)

Result of code execution:

python'! ! ! ! xhx x@x'

Example

In this example, the search pattern looks like this: letter 'x', then not a number, not a period, and not a lowercase Latin letter, then letter 'z':

pythontxt = 'xaz x1z xAz x.z x@z'
res = re.sub('x[^\d.a-z]z', '!', txt)

print(res)

Result of code execution:

python'xaz x1z ! x.z !'

Practical tasks