A simple Python script to get the line count of a file

lineCount.py

#!/usr/bin/env python

import sys
try:
    import argparse
except ImportError:
    sys.exit("Failed to import the argparse library. Please install for Python 2.6 or use Python 2.7 or higher")

Arguments = argparse.ArgumentParser(add_help=True)
Arguments.add_argument('-f',
    '--file',
    type=str,
    default=None,
    help="File to count lines")


#   Count the number of lines
def line_count(name):
    fname = open(name)
    num_lines = sum(1 for line in fname)
    fname.close()
    return(num_lines)


#   Do the work here
def main():
    if not sys.argv[1:]:
        sys.exit("Please specify a file")
    else:
        line_count(args.file)

#   Run the program
main()