argparse.ArgumentParser.add_argument()

ArgumentParser.add_argument(name or flags...[, action][, nargs][, const][, default][, type][, choices][, required][, help][, metavar][, dest])

Define how a single command-line argument should be parsed. Each parameter has its own more detailed description below, but in short they are:

• name or flags - Either a name or a list of option strings, e.g. foo or -f, --foo.
• action - The basic type of action to be taken when this argument is encountered at the command line.
• nargs - The number of command-line arguments that should be consumed.
• const - A constant value required by some action and nargs selections.
• default - The value produced if the argument is absent from the command line.
• type - The type to which the command-line argument should be converted.
• choices - A container of the allowable values for the argument.
• required - Whether or not the command-line option may be omitted (optionals only).
• help - A brief description of what the argument does.
• metavar - A name for the argument in usage messages.
• dest - The name of the attribute to be added to the object returned by parse_args().