importargparse p=argparse.ArgumentParser() p.add_argument('--parameter',help='Optional parameters') args=p.parse_args()ifargs.parameter:print(args.parameter)else:print('no parameter') 若把此代码保存为arg.py,则执行的时候可带参数也可不带: python arg.py python arg.py hello,world 以上为3种入...
print "parameter%s = %s"%(i, sys.argv[i]) 在dos输入Pythonarg_sys.py 1 2 3 4 5 why choice argparse ? 2.7之后python不再对optparse模块进行扩展,推荐使用argparse模块对命令行进行解析。 来自stackoverflow的说明 As of 2.7, optparse is deprecated, and will hopefullyGoaway in the future. argparse...
if __name__ == '__main__': parser = argparse.ArgumentParser(description="工程编译工具") 创造一个解析对象parser,这差不多就是一个装载参数的容器。可以给这个对象写一个描述,描述一下这个解析对象。 给这个解析对象添加几个命令行参数。 参数名字前面加上--,这就表示这是个选择性参数optional arguments。
p.add_argument('-p',help='Optional parameters',required = True) 1. 2、可选项一 import argparse p = argparse.ArgumentParser() p.add_argument('-p',help='Optional parameters') args = p.parse_args() if args.p: print(args.p) else: print('no var') 1. 2. 3. 4. 5. 6. 7. 8....
区分Positional Argument 和 Optional Argument 通过上文中argparse.ArgumentParser()的prefix_chars来定义,默认为“-” 具体参数详见https://docs.python.org/2.7/library/argparse.html#argumentparser-objects classargparse.ArgumentParser(prog=None,usage=None,description=None,epilog=None,parents=[],formatter_class=arg...
Theargparseis a standard module; we do not need to install it. A parser is created withArgumentParserand a new parameter is added withadd_argument. Arguments can be optional, required, or positional. Optional argument The following example creates a simple argument parser. ...
在函数的形参中,如果同时有*parameter和**parameter,*parameter必须在**parameter前面。 def func(*args): print(args) func(33,44,55,66,77) func(*(33,44,55,66,77)) #运行结果 (33,44,55,66,77) (33,44,55,66,77) def func(**kwargs): print(kwargs) func(e=33,h=44,f=55,d=66,c...
Remember that in the argparse terminology, arguments are called positional arguments, and options are known as optional arguments. The first argument to the .add_argument() method sets the difference between arguments and options. This argument is identified as either name or flag. So, if you ...
一般来说,要让python可以读取terminal中给的指令,在main入口出第一件事就是使用ArgumentParser解析指令,分三步。 (1)使用argparse.ArgumentParser建立存放argument的list if __name__ == '__main__': #Instantiate the parser optparser = argparse.ArgumentParser(description='Optional app description'); ...
To see this in action, create a script named stereo_booster.py that takes paths to the input and output WAV files as arguments with an optional strength parameter: Python stereo_booster.py from argparse import ArgumentParser def main(): args = parse_args() def parse_args(): parser = ...