replace strings in file with other random strings having the same number of letters
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# usage: | |
# python replacer.py wordlist input_file output_file | |
import sys | |
import re | |
import random | |
words = dict() | |
allwords = set() | |
for line in open(sys.argv[1]): | |
line = line.strip() | |
if len(line) not in words: | |
words[len(line)] = [] | |
words[len(line)].append(line) | |
allwords.add(line) | |
def match_case(instr, fromstr): | |
assert(len(instr) == len(fromstr)) | |
return "".join([instr[i].upper() if fromstr[i].isupper() \ | |
else instr[i].lower() for i in range(len(instr))]) | |
def wordrepl(mobj): | |
match = mobj.group(0) | |
if match.lower() in allwords: | |
return match_case(random.choice(words[len(mobj.group(0))]), match) | |
else: | |
return mobj.group(0) | |
contents = open(sys.argv[2], "rb").read() | |
contents = re.sub(r"([a-zA-Z]{3,})", wordrepl, contents) | |
outputf = open(sys.argv[3], "wb") | |
outputf.write(contents) | |
outputf.close() |
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