ArgParser Example

argParser.py

import argparse

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='Easy way to produce plots of\
    3D vector fields in python.')
    parser.add_argument('task',
                        help='task name',
                        type=str)
    parser.add_argument("-f", '--fileNameTag',
                        help='Appends it to the end of a filename so it can be unique when you plot it',
                        type=str,
                        default="0")
    parser.add_argument("-d", '--depths',
                        help='integer - amount of depths/layers',
                        type=int,
                        default=3)
    parser.add_argument("-s", '--size',
                        help='int - size of the domain (s,s)',
                        type=int,
                        default=15)
    parser.add_argument("-p", '--density',
                        help='int - density of the plot (higher values mean more lines)',
                        type=float,
                        default=1)
    parser.add_argument("-l", '--length',
                        help='int - length or min length',
                        type=float,
                        default=0.1)
    args = parser.parse_args()

    if args.task == "quiver":
        quiver(size      = args.size,
               layers    = args.depths,
               fileTag   = args.fileNameTag)
    if args.task == "stream":
        stream(size = args.size,
               layers = args.depths,
               density = args.density,
               minLength = args.length,
               fileTag = args.fileNameTag)