如何修改python脚本以在命令行中使用外部文件作为输入？

import sys

def main(input_file):
    try:
        with open(input_file, 'r') as file:
            for line in file:
                print(line.strip())
    except FileNotFoundError:
        print(f"Error: File '{input_file}' not found.")
    except Exception as e:
        print(f"An error occurred: {e}")

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: python script.py <input_file>")
    else:
        input_file = sys.argv[1]
        main(input_file)

Hello, World!
This is a test file.

python read_file.py data.txt

Hello, World!
This is a test file.