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In this article Xiaobian for you to introduce in detail "python how to multiply the matching number in the string by 2", the content is detailed, the steps are clear, and the details are handled properly. I hope this article "python how to multiply the matching number in the string by 2" can help you solve your doubts.

The repl parameter is a function

The following example multiplies the matching number in the string by 2:

Example

#! / usr/bin/python

Import re

# multiply the matching number by 2

Def double (matched):

Value = int (matched.group ('value'))

Return str (value * 2)

S = 'A23G4HFD567'

Print (re.sub ('? P\ d +)', double, s))

The output of the execution is:

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