Something

import sys, refile = open("c:/1.txt", "r")newfile = open("c:/5.txt", "w")contents = file.read()def dashrepl(matchobj):     return matchobj.group(1)newfile.write(re.sub(".*?(\{\{(U|u)delh\}\}.*?\{\{(U|u)delf\}\}).*?", dashrepl, contents))newfile.close();file.close()