Python3 --- argparse library

 

Examples of functions:

Import argparse 

# create a parser (using argparse first step is to create a ArgumentParser Objects) 
Parser = argparse.ArgumentParser (the Description = ' Process some integers ' )
 # add the parameter 
# to add a ArgumentParser program parameter information by calling add_argument ( ) Method completed. 
# Usually, these calls ArgumentParser specify how to obtain command-line string and convert it to an object. This information is stored and used when parse_args () is called. 
parser.add_argument ( ' integers ' , metavar = ' N ' , type = int, nargs = ' + ' , help = ' an integer for the accumulator ' ) 
parser.add_argument ( ' --sum' , Dest = ' the accumulate ' , Action = ' store_const ' , const = SUM, default = max, Help = ' SUM The integers (default: Find The max) ' )
 # resolution parameters 
# ArgumentParser by parse_args () method of resolution parameters. It will check the command line, convert each parameter to the appropriate type and then call the corresponding operation. 
# In most cases, this means a simple Namespace object parsed from the command line parameter attributes construct: 
args = parser.parse_args ()
 Print (args.accumulate (args.integers))

operation result:

(base) D:\PycharmProjects1>python.exe argparse_test.py -h
usage: argparse_test.py [-h] [--sum] N [N ...]

Process some integers

positional arguments:
  N           an integer for the accumulator

optional arguments:
  -h, --help  show this help message and exit
  --sum       sum the integers (default: find the max)

(base) D:\PycharmProjects1>python.exe argparse_test.py 12 33 44
44

(base) D:\PycharmProjects1>