py_template

#!/usr/bin/env python3
# coding: utf-8
#
### py/lint: disable=wrong-import-position
#

'''
A simple python template that ultilize argparse to take CLI arguments
'''

import argparse

#import sys
#sys.path.insert(0, "..")
#from myutil import MyDebug

def main():
    ''' main '''
    msg = 'hello world'
    print(f'\{{msg}\}')

    parser = argparse.ArgumentParser(description='brief description for this script')
    # nargs like regexp, '*' means 0+, '+' means 1+
    parser.add_argument("strings", metavar='str', type=str, nargs='*',
        help="show these strings")
    parser.add_argument('-o', '--output', help='Output file name', default='stdout')
    parser.add_argument("-v", "--verbose", action='store_true', default=False,
        help='verbose mode')
    parser.add_argument("--zoo", dest="zoo", help="no short and assign dest")
    # define the required args
    requiredNamed = parser.add_argument_group('required named arguments')
    requiredNamed.add_argument('-i', '--input', help='Input file name', required=True)

    #parser.parse_args(['-i input.txt -o out.txt str1 str2'])

    args = parser.parse_args()

    print(args.strings)
    if args.output:
        print('output:', args.output)
    if args.input:
        print('input:', args.input)

    # to show help message directly
    #parser.print_help()

if __name__ == '__main__':
    main()