Source code lines and statements counter (Contador de linhas e estruturas de código fonte)

contador.py

import sys, os, re
info = {"folder": sys.argv[1], "extensions": sys.argv[2].split(","), "statements": dict.fromkeys(["if", "for", "while", "do", "switch", "case"], 0), "lines": 0}
for dirpath, dirnames, filenames in os.walk(info["folder"]):
    for filelines in [open(os.path.join(dirpath, fname)).readlines() for fname in filenames if fname.split(".")[-1] in info["extensions"]]:
        for line in filelines:
            info["lines"] += 1
            found = re.search(r"^\s*(%s)\b" % "|".join(info["statements"].keys()), line)
            if found != None: info["statements"][found.group(1)] += 1
print "O seu codigo possui:\n %d linhas\n" % info["lines"] + "\n".join(" %s: %d" % (k, v) for k, v in info["statements"].iteritems())