#! /usr/bin/env python """finddiv - a grep-like tool that looks for division operators. Usage: finddiv [-l] file_or_directory ... For directory arguments, all files in the directory whose name ends in.py are processed, and subdirectories are processed recursively. This actually tokenizes the files to avoid false hits in comments orstrings literals. By default, this prints all lines containing a / or /= operator, ingrep -n style.  With the -l option specified, it prints the filenameof files that contain at least one / or /= operator.""" import osimport sysimport getoptimport tokenize def main():    try:        opts, args = getopt.getopt(sys.argv[1:], "lh")    except getopt.error, msg:        usage(msg)        return 2    if not args:        usage("at least one file argument is required")        return 2    listnames = 0    for o, a in opts:        if o == "-h":            print __doc__            return        if o == "-l":            listnames = 1    exit = None    for filename in args:        x = process(filename, listnames)        exit = exit or x    return exit def usage(msg):    sys.stderr.write("%s: %s\n" % (sys.argv[0], msg))    sys.stderr.write("Usage: %s [-l] file ...\n" % sys.argv[0])    sys.stderr.write("Try `%s -h' for more information.\n" % sys.argv[0]) def process(filename, listnames):    if os.path.isdir(filename):        return processdir(filename, listnames)    try:        fp = open(filename)    except IOError, msg:        sys.stderr.write("Can't open: %s\n" % msg)        return 1    g = tokenize.generate_tokens(fp.readline)    lastrow = None    for type, token, (row, col), end, line in g:        if token in ("/", "/="):            if listnames:                print filename                break            if row != lastrow:                lastrow = row                print "%s:%d:%s" % (filename, row, line),    fp.close() def processdir(dir, listnames):    try:        names = os.listdir(dir)    except os.error, msg:        sys.stderr.write("Can't list directory: %s\n" % dir)        return 1    files = []    for name in names:        fn = os.path.join(dir, name)        if os.path.normcase(fn).endswith(".py") or os.path.isdir(fn):            files.append(fn)    files.sort(lambda a, b: cmp(os.path.normcase(a), os.path.normcase(b)))    exit = None    for fn in files:        x = process(fn, listnames)        exit = exit or x    return exit if __name__ == "__main__":    sys.exit(main())