Replace multiple newlines with single newlines during reading file

Question

I have the next code which reads from multiple files, parses obtained lines and prints the result:

import os
import re

files=[]
pars=[]

for i in os.listdir(\'pa         


        

Answer 1

Just would like to point out: regexes aren't the best way to handle that. Replacing two empty lines by one in a Python str is quite simple, no need for re:

entire_file = "whatever\nmay\n\nhappen"
entire_file = entire_file.replace("\n\n", "\n")

And voila! Much faster than re and (in my opinion) much easier to read.