输出格式：textpython tool.py add 文件1.txt --json输出：执行添加操作，添加项：文件1.txt，输出格式：jsonpython tool.py add 文件1.txt --text --json输出（报错）：usage: tool.py add [-h] [--text | --json] itemtool.py add: error: argument --json: not allowed with argument --text可以...
Indicate whether an argument is required or optional True or False type Automatically convert an argument to the given type int, float, argparse.FileType('w'), or callable function示例 以下代码是一个 Python 程序,它获取一个整数列表并计算总和或者最大值: import argparse parser = argparse.ArgumentPar...
import argparseparser = argparse.ArgumentParser(description='Example with non-optional arguments')parser.add_argument('count', action="store", type=int)parser.add_argument('units', action="store")print parser.parse_args() 1. 在这个例子中,“count”参数是一个整数,“units”参数存储为一个字符串。...
metavar='N',type=int,nargs='+',help='an integer for the accumulator')parser.add_argument('--sum',dest='accumulate',action='store_const',const=sum,default=max,help='sum the integers (default: find the max)')args=parser.parse_args()print(args.accumulate(args.integers))...
optional arguments: -h, --help show this help message and exit --verbose, -v v出现的次数9、version在add_argument()调用中需要一个version=关键字参数,打印版本信息并在调用时退出1 2 3 4 5 6 7 import argparse parser = argparse.ArgumentParser(prog='PROG') parser.add_argument('--version', ac...
'_has_negative_number_optionals', '_match_argument', '_match_arguments_partial', '_mutually_exclusive_groups', '_negative_number_matcher', '_option_string_actions', '_optionals', '_parse_known_args', '_parse_optional', '_pop_action_class', '_positionals', '_print_message', '_read_...
parser.add_argument('-p', '--print_urls', default=False, help="Print the URLs of the images", action="store_true") parser.add_argument('-ps', '--print_size', default=False, help="Print the size of the images on disk", action="store_true") ...
| after a command-line argument has been converted to the appropriate | type, an exception will be raised if it is not a member of this | collection. | | - required -- True if the action must always be specified at the | command line. This is only meaningful for optional command-lin...
| command line. This is only meaningful for optional command-line | arguments. | | - help -- The help string describing the argument. | | - metavar -- The name to be used for the option's argument with the | help string. If None, the 'dest' value will be used as the name....
optional arguments: -h, --help show this help message and exit 3. 定义参数 在argparse中,您可以使用add_argument()方法来定义参数。例如下面的例子,演示了如何使用argparse定义不同类型的参数: import argparse def main(): # 创建 ArgumentParser 对象 ...