Python Command Line Arguments - Learn how to use command line arguments in Python with this tutorial. Understand the sys module and see examples of parsing arguments.
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...
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 we don’t have a long version). The “positional arguments” are not optional, and their names ...
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: 实例 #!/usr/bin/python # -*- coding: ...
optional arguments:-h, --help show this help message and exit 3. 使用argparse模块,添加参数, #coding=utf-8importargparseif__name__=="__main__":print"arg test"parser=argparse.ArgumentParser() parser.add_argument("reportname", help="set the reportname by this argument") ...
You can find the total number of command-line arguments using the sys.argv list in Python. We will pass the sys.argv list to thelen()function as an input argument. Thelen()function will return the length of the sys.argv list. As the first element of the sys.argv list is the name of...
# 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(...
Thus, sys.argv is basically an array holding the command line arguments of our program. The first element in the sys.argv list is the name of the program itself. The arguments passed to the program are present at index 1 onwards in the sys.argv list in the same that are passed while ...
Parsing Command-line Arguments with Getopt Getopt is another module for command-line parsing in Python. It’s more C-like, but it’s also more verbose than argparse. importgetoptimportsys# Define our optionsshort_options='n:'long_options=['name=']try:arguments,values=getopt.getopt(sys.argv[...
When we run this script with a list of command line arguments, here is the result: python main.py arg1 arg2 arg3 # Prints "The script was called with 3 arguments" One thing to note is that the sys module considers the parameters to be delimited by spaces unless you use double quotes...