Python中的format_command()函数实现命令行格式化输出

format_command()函数的作用是将命令行中的参数与选项格式化输出，并可以添加相应的描述信息。

下面是format_command()函数的一个实现示例：

def format_command(command, args=None, options=None, description=None):
    # 格式化输出命令行命令
    formatted_command = f"{command}"

    # 添加参数
    if args:
        formatted_command += " " + " ".join(args)

    # 添加选项
    if options:
        for option in options:
            formatted_command += f" --{option}"

    # 添加描述信息
    if description:
        formatted_command += f"
  {description}"

    return formatted_command

使用示例：

# 示例1：只有命令
command1 = "python script.py"
formatted_command1 = format_command(command1)
print(formatted_command1)
# 输出：python script.py

# 示例2：命令和参数
command2 = "python script.py"
args2 = ["-i", "input.txt", "-o", "output.txt"]
formatted_command2 = format_command(command2, args2)
print(formatted_command2)
# 输出：python script.py -i input.txt -o output.txt

# 示例3：命令、参数和选项
command3 = "python script.py"
args3 = ["-i", "input.txt", "-o", "output.txt"]
options3 = ["verbose", "force"]
formatted_command3 = format_command(command3, args3, options3)
print(formatted_command3)
# 输出：python script.py -i input.txt -o output.txt --verbose --force

# 示例4：命令、参数、选项和描述信息
command4 = "python script.py"
args4 = ["-i", "input.txt", "-o", "output.txt"]
options4 = ["verbose", "force"]
description4 = "This is a sample command."
formatted_command4 = format_command(command4, args4, options4, description4)
print(formatted_command4)
# 输出：
# python script.py -i input.txt -o output.txt --verbose --force
#   This is a sample command.

format_command()函数可以根据实际需要来使用，并且可以根据具体情况进行扩展和修改。