import argparse
parser = argparse.ArgumentParser()
parser.add_argument(..., nargs='+', action='append', ...)
args = parser.parse_args()nargs - number of arguments
+- 1 or more arguments*- 0 or more arguments?- 0 or 1 arguments[some number]- Specify an explicit number of arguments
action - What action to perform on the arguments
'append'- Append all arguments together
Now, in the command line, to specify a 2D list as an argument, the specified argument switch name can be used each time for a 1D list
python test.py -i 1 2 3 -i 4 5 6 -i 7 8 9
The append action will append all the -i arguments and nargs='+' tells the computer that there are more than 1 arguments to process