How can Python retrieve command line arguments?

Python can utilize the sys module to retrieve command line arguments. Here are the specific steps:

1. import the sys module
2. You can use sys.argv to access command-line arguments, which is a list containing all the command-line arguments. The first element is the script’s name, followed by any additional arguments passed to the script.
3. The first argument provided in the command line.

The example code is as follows:

import sys

# 打印所有的命令行参数
print(sys.argv)

# 获取第一个参数
arg1 = sys.argv[1]
print("第一个参数是：", arg1)

When running a Python script from the command line, you can pass arguments, for example python script.py arg1 arg2, where arg1 and arg2 are the command line parameters.