keybase sign script to replace comment with /verify (makes it easier for recipients)

sign.py

#!/usr/bin/python3
import argparse
from subprocess import check_output

# keybase sign message or file
# replace comment with /verify so recipients can find it easily

parser = argparse.ArgumentParser(description='Sign message.')
parser.add_argument('-i', dest='file_path', default=None,
                    help='file input', nargs=1)
parser.add_argument('-m', dest='message', default=None,
                    help='message input', nargs=1)

def main():
    args = parser.parse_args()
    if args.file_path is None and args.message is None:
        parser.print_help()
        return
    input_flag=None
    data=None
    if args.message is not None:
        input_flag = '-m'
        data = args.message[0]
    else:
        input_flag = '-i'
        data = args.file_path[0]
    result = check_output(['keybase', 'pgp', 'sign', \
            input_flag, data])
    result = result.decode("utf-8")
    result = result.replace('https://keybase.io/download', \
            'https://keybase.io/verify')
    print(result, end ='')

if __name__ == '__main__':
    main()