How to extract only numbers from input file. Numbers can be float/int

Question

I want to extract numbers(integers and float) from a file(exclude all special symbols and alphabets). Numbers from all positions.

import re
file = open(\'input_f         


        

Answer 1

re.findall("[+-]?\d+\.?\d*",some_text)

I think at least

[+-]? zero or one of either + or - (ie optional)

\d+ one or more digits

\.? optionally a decimal

\d* zero or more additional numbers