为什么当我检查我的接口时，我得到一个语法错误？尝试使用Python/argparse为Linux创建MAC转换器

import argparse

def convert_mac(mac, separator):
    parts = mac.split(':')
    return separator.join(parts)

def main():
    parser = argparse.ArgumentParser(description='MAC Address Converter')
    parser.add_argument('mac', help='Input MAC address in colon-separated format')
    parser.add_argument('--separator', '-s', default='-', help='Output separator (default: -)')
    args = parser.parse_args()

    try:
        converted_mac = convert_mac(args.mac, args.separator)
        print(f'Converted MAC: {converted_mac}')
    except Exception as e:
        print(f'Error: {e}')

if __name__ == '__main__':
    main()

File "script.py", line 5
    print(f'Converted MAC: {converted_mac}')
                            ^
SyntaxError: invalid syntax