读取txt文件的第一行和最后一行；最快方法和子过程故障排除

def read_first_and_last_line(file_path):
    try:
        with open(file_path, 'r') as file:
            first_line = file.readline().strip()
            last_line = None
            for line in file:
                last_line = line.strip()
            return first_line, last_line
    except FileNotFoundError:
        print("File not found.")
    except IOError:
        print("Error reading the file.")

# 调用函数并传入txt文件路径
first_line, last_line = read_first_and_last_line('example.txt')

# 打印结果
print("First line:", first_line)
print("Last line:", last_line)