parser= argparse.ArgumentParser(description='Test command line arguments') parser.add_argument('-w','--width', type=int, default=30, help='Width of a rectangle') parser.add_argument('-H','--height', type=int, help='Height of a rectangle') args=parser.parse_args()print(f'Rectangle: ...
Python argparse module Python argparse module is the preferred way to parse command line arguments. It provides a lot of option such as positional arguments, default value for arguments, help message, specifying data type of argument etc. At the very simplest form, we can use it like below. ...
parser.add_argument('-s','--save-file', help='Description', required=False) args = parser.parse_args() print(args.open_file) print(args.save_file) Docopt Docopt can be used to create command line interfaces. fromdocoptimportdocopt if__name__ =='__main__': arguments = docopt(__doc...
add_argument('-o', dest='outfile', action='store', help='output file') parser.add_argument('--speed', dest='speed', action='store', choices={'slow','fast'}, default='slow', help='search speed') args = parser.parse_args() # Output the collected arguments print(args.filenames)...
optional arguments: -h, --help show this help message and exit 儲存引數資料的 Namespace 物件 使用parse_args()從 parser 取得引數資料後,此函數會回傳Namespace物件,這只是一個單純把資料用屬性(attribute)儲存下來的超簡單類別。 ## 延續上方傳入三個引數的範例 ...
# head command # working with positional arguments parser = argparse.ArgumentParser() parser.add_argument('f', type=str, help='file name') parser.add_argument('n', type=int, help='show n lines from the top') args = parser.parse_args() ...
Accepting optional command-line arguments This version of ouradd.pyprogram accepts an optional--expectedor-eargument: importargparseparser=argparse.ArgumentParser()parser.add_argument('x',type=float)parser.add_argument('y',type=float)parser.add_argument('--expected','-e',type=float)args=parser.pa...
args = parser.parse_args()print(args.test) 运行结果: $ python parse_command_line_option.py -h usage: parse_command_line_option.py [-h] [-ttest] Simple argparsetestoptional arguments: -h, --helpshow thishelpmessage andexit-ttestThis is atestparam ...
to write user-friendly command-line interfaces. The program defines what arguments it requires, and argparse will figure out how to parse those out of sys.argv. The argparse module also automatically generates help and usage messages and issues errors when users give the program invalid arguments....
1. 可选参数 (Optional Arguments)可选参数不是必须输入的，通常用 - 或 -- 开头。 例如 -v 或 --verbose。修改 greet.py，添加一个可选参数 -v 或 --verbose，用于控制是否输出详细信息。import argparseparser = argparse.ArgumentParser(description='一个简单的问候程序')parser.add_argument('name', help...