不能在代码里面加传入的参数。 一个传入的参数长这样:--features-db,取出这个参数值得时候args["features_db"]。
这产生以下结果 - Number of arguments: 4 arguments. Argument List: ['test.py', 'arg1', 'arg2', 'arg3'] NOTE- 如上所述,第一个参数始终是脚本名称,它也被计入参数数量。 Parsing Command-Line Arguments Python提供了一个getopt模块,可以帮助您解析命令行选项和参数。 该模块提供了两个函数和一个例外...
Below is the output from quick run of above script. Python argparse module provide a lot many features, you should read about them atpython argparsetutorial for clear understanding. That’s all for different options to read and parse command line arguments in python, you should decide which is...
First step to design the command line interface is to set up parser object. This is done byArgumentParser()function in argparse module. The function can be given an explanatory string as description parameter. To start with our script will be executed from command line without any arguments. St...
Usually, for all optional arguments, we provide the long option and sometimes also the short option. Then we can access the value provided from the command line using the long option as the key (with the hyphen replaced with an underscore or the single-character short option as the key if...
The highlighted line in this code snippet does the magic. In the call to .add_argument(), you use nargs with the question mark (?) as its value. You need to do this because all the command-line arguments in argparse are required, and setting nargs to either ?, *, or + is the on...
arguments = sys.argv[1:] The above statement performslist slicingto select elements from index 1 to the last element of the sys.argv list. After obtaining the list of command line arguments, you can use them in your program however you want. ...
我们的脚本需要做的第一件事就是获取命令行参数的值。当我搜索“python command line arguments”时,出现的第一个结果是关于sys.argv的,所以我们来试试这个方法…… “初学者”的方法 sys.argv 是个列表,包含用户在运行脚本时输入的所有参数(包括脚本名自身)。
Python 提供了getopt模块来获取命令行参数。 $ python test.py arg1 arg2 arg3 Python 中也可以使用sys的sys.argv来获取命令行参数: sys.argv 是命令行参数列表。 len(sys.argv) 是命令行参数个数。 注:sys.argv[0] 表示脚本名。 实例 test.py 文件代码如下: ...
# python3 test.py --helpusage: myprogram [-h] [-a] [-b VALUE_OF_B] [-V]这些描述内容会在执行--help时显示.optional arguments:-h, --help show this help message and exit-a option a-b VALUE_OF_B option b-V, --version show program's version number and exit# python3 test.py ...