calculates & prints loc and ncloc of python files

ncloc.py

import tokenize
from token import *


def print_metrics(path):
    """prints LOC and NCLOC of the input file"""

    fo = open(path, "rb")  # open file in byte mode
    tokens = tokenize.tokenize(fo.readline)  # tokenize it

    # counters
    ncloc = -2  # we don't want to count endmarker & encoding
    loc = -2

    tokens = list(tokens)

    for i, token in enumerate(tokens):
        if token.start[0] != tokens[i-1].start[0]:  # this way we only count whole-line comments
            loc += 1
            ncloc += 1
            if tok_name[token.type] == "COMMENT":  # comment detected
                ncloc -= 1
            elif tok_name[token.type] == "NL":  # empty line detected
                ncloc -= 1

    print("LOC in \"{0}\": {1}".format(fo.name, loc))
    print("NCLOC in \"{0}\": {1}".format(fo.name, ncloc))