lines.py

__author__ = 'Gareth Coles'

import fnmatch
import os

matches = []

for root, dirnames, filenames in os.walk('src'):
    for filename in fnmatch.filter(filenames, '*.java'):
        matches.append(os.path.join(root, filename))

lines = 0

for fn in matches:
    fh = open(fn)
    lines += fh.read().count("\n")

print("Lines: {0}".format(lines))