User enters command line arguments Program reads the arguments Arguments passed to main function Execution Main function processes the arguments Python main function parameter passing 四、序列图示例 为进一步理解函数调用和参数传递的顺序,我们可以使用序列图: MainFunctionProgramUserMainFunctionProgramUserRun scrip...
importargparsedefmain():# Create the parserparser=argparse.ArgumentParser(description="Sample script to demonstrate command-line arguments.")# Add argumentsparser.add_argument("arg1",help="The first argument")parser.add_argument("arg2",help="The second argument")# Parse the argumentsargs=parser.par...
optional arguments:-h, --help show this help message and exit C:\PycharmProjects\p3\src\pyproject1>python argTest.py report1.htmlarg test report1.html 4. 再添加一个可选择的参数,没有配置可选参数时,读取该参数,获取的是None #coding=utf-8import argparseif__name__ =="__main__": print"...
# import the necessary packages import argparse # construct the argument parse and parse the arguments ap = argparse.ArgumentParser() ap.add_argument("-n", "--name", required=True, help="name of the user") args = vars(ap.parse_args()) # display a friendly message to the user print(...
In this example, we have first stored the command line arguments in apython variable. After that, we have printed the values using the printfunction in Python. Conclusion In this article, we have discussed the working of sys.argv in Python. To know more aboutpython programming, you can read...
print'输出的文件为:',outputfile if__name__=="__main__": main(sys.argv[1:]) 执行以上代码,输出结果为: $ python test.py-h usage:test.py-i<inputfile>-o<outputfile>$ python test.py-i inputfile-o outputfile输入的文件为:inputfile输出的文件为:outputfile...
python main.py -v=2 The script will print “Show the value: 2”. Using argparse to handle Python command line arguments The argparse module has been available since Python 3.2 and adds some features to the optparse module. Unlike the other two methods above where we had to write extra cod...
functionname='拍照'#默认值partdate ='20191128'try: opts, args= getopt.getopt(argv,"hf:p:", ["help","functionname=","partdate="])#表示参数选项有:-h, -f, -p, --help, --functionname, --partdate,它们相互对应;该方法的返回值有两个元素: 第一个是(opt, value)元组的列表,第二个是一...
9. Command Line Arguments Working with and parsing command line arguments: import sys # The script's name is the first argument, followed by those passed by the invoker script, first_arg, second_arg = sys.argv print(f"Invoked with the sacred tokens: {first_arg} and {second_arg}") 10...
Thenargsspecifies the number of command-line arguments that should be consumed. charseq.py #!/usr/bin/python import argparse import sys # nargs sets the required number of argument values # metavar gives name to argument values in error and help output ...