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Displays the total number of code lines in a single source file or for all the files of the same type in an entire directory. User provides a filename including the extension, or an just the extension preceded by a wildcard character.

Python, 44 lines
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 #!/usr/local/bin/python

import re
import os
import sys 
import glob

# regex to handle various comment styles.
expression = re.compile('^\s*?[/*|//|#][*]*.*?')

def parse(sourcefile):
    lcount, ccount = 0, 0

    try:
        file = open(sourcefile, 'r')
    except IOError:
        sys.exit(0)

    for line in file.readlines():
        lcount += 1
        if expression.match(line):
            ccount += 1

    file.close()
    return lcount, ccount


def main():
    # total line count, total comment count
    tlc = tcc = 0    
     
    if not len(sys.argv) > 1:
        print 'Provide filename or extension'
    else:
        for file in glob.glob(sys.argv[1]):
            lc, cc = parse(file)
            print 'processing file: %(file)s %(lc)s' % locals()
            tlc += lc
            tcc += cc
    
    print 'total lines = %(tlc)s\ntotal comments = %(tcc)s' % locals()


if __name__ == "__main__": main()

Wanting a quick and dirty way to determine the total number of lines in a Java project I was writing, Python was the perfect choice for cooking up a script to do so. The tool is somewhat limited as it only works for Java, C++, and Python or Perl files, but these are the languages students will be most familiar.

1 comment

Drew Perttula 19 years, 5 months ago  # | flag

anyone care to handle docstrings? I wanted this the other day, but I need my (extensive :) docstrings to be counted as comments in order to get an accurate result. The above solution can be had in a single line of shell script using egrep. I'm looking for something that involves the python parser perhaps.