python之argparse模块

最近工作上经常会用到argparse，这里做个简单的总结

argparse 其实就是 命令行参数解析 模块

使用方法很简单，如下所示：

import argparse

parser = argparse.ArgumentParser(description="xxxxx") #初始化
parser.add_argument("--input", required=True, help="input path") #添加参数

argments = parser.parse_args() #解析参数

print("input path {path}".format(path=argments.input)) #使用参数

关于ArgumentParser的声明如下（源码）：

class ArgumentParser(_AttributeHolder, _ActionsContainer):
    """Object for parsing command line strings into Python objects.

    Keyword Arguments:
        - prog -- The name of the program (default: sys.argv[0])
        - usage -- A usage message (default: auto-generated from arguments)
        - description -- A description of what the program does
        - epilog -- Text following the argument descriptions
        - parents -- Parsers whose arguments should be copied into this one
        - formatter_class -- HelpFormatter class for printing help messages
        - prefix_chars -- Characters that prefix optional arguments
        - fromfile_prefix_chars -- Characters that prefix files containing
            additional arguments
        - argument_default -- The default value for all arguments
        - conflict_handler -- String indicating how to handle conflicts
        - add_help -- Add a -h/-help option
        - allow_abbrev -- Allow long options to be abbreviated unambiguously
    """

    def __init__(self,
                 prog=None,
                 usage=None,
                 description=None,
                 epilog=None,
                 parents=[],
                 formatter_class=HelpFormatter,
                 prefix_chars='-',
                 fromfile_prefix_chars=None,
                 argument_default=None,
                 conflict_handler='error',
                 add_help=True,
                 allow_abbrev=True):

使用这个模块，能让参数使用的更加明确，能让其他人知道应该怎么使用参数

添加参数的时候，做好说明