count comments as a percentage of LOC with cloc

cloccomment.py

#!/usr/bin/env python
# cloccomment.py - using cloc, return percentage of code that is comments
# usage: cloccomment <arguments to be passed to cloc>
import sys
import subprocess

args = sys.argv[1:]

results = subprocess.check_output(['cloc'] + args).decode('utf-8')

print(results)
results = results.split('\n')

i = 0
while i < len(results):
    line = results[i]
    if line.startswith('Language'):
        i += 2
        break
    i += 1

while i < len(results):
    line = results[i]
    i += 1
    if line.startswith('-'):
        continue
    if line.strip() == '':
        break
    vals = line.split()
    # print(vals)
    lang = ' '.join(vals[:-4])
    comments = int(vals[-2])
    loc = int(vals[-1])

    pct = (float(comments) / (loc + comments)) * 100

    fmt = (lang, comments, comments + loc, round(pct, 2))
    print("%s %s out of %s were comments (%s%%)" % fmt)