# importing required modules
import argparse
# create a parser object
parser = argparse.ArgumentParser(description = "An addition program")
# add argument
parser.add_argument("add", nargs = '*', metavar = "num", type = int,
help = "All the numbers separated by spaces will be added.")
# parse the arguments from standard input
args = parser.parse_args()
# check if add argument has any input data.
# If it has, then print sum of the given numbers
if len(args.add) != 0:
print(sum(args.add))
it is CLI , please how to install it through brew .
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