Basename in Python

basename.py

#!/usr/bin/env python

#   A script to get the basename of a file in Python

#   Import modules from the standard Python library
import sys
import os
try:
    import argparse
except ImportError:
    sys.exit("Please install either the argparse module or Python 2.7 or greater")

#   Set and parse the arguments
Arguments = argparse.ArgumentParser(add_help=True)
Arguments.add_argument('-f',
    '--file',
    type=str,
    default=None,
    metavar="FILE",
    help="Full path to file to extract basename from")
args = Arguments.parse_args()

#   Get the basename
def basename(f):
    base = os.path.basename(f)
    return base

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


#   Run the program
main()