Python 2.7 quick reference |  |
Python 2.7 quick reference | |
Here is the general procedure for using the argparse module to check and process your command
line arguments, which in most cases will come from sys.argv (see Section 28.6, “sys: Universal system interface”).
Create an argparse.ArgumentParser
instance. See Section 28.10.3, “The ArgumentParser() constructor”.
For each command line argument, call the .add_argument() method of that instance
once to define what that argument may be. See
Section 28.10.4, “The ArgumentParser.add_argument()
method”.
Call the .parse_args() method of the
instance. If there are any errors in the command
line, this method will print a message summarizing
the arguments, and then terminate execution.
If the arguments are correct according to the rules
that you have specified, all the values will be
packaged into an object containing all your
arguments as attributes, with default values filled
in where necessary. See Section 28.10.5, “The ArgumentParser.parse_args()
method”.