创建文件cats.txt和dogs.txt，在第一个文件中至少存储三只猫的名字，在第二个文件中至少存储三条狗的名字。 (1) 编写一个程序，尝试读取这些文件，并将其内容打印到屏幕上。 (2) 将程序代码放在一个try-except 代码块中，以便在文件不存在时捕获FileNotFound 错误，并显示一条友好的消息。 (3) 将任意一个文件移到另一个地方，并确认except 代码块中的代码将正确执行。

(1) 读取文件内容并打印：

try:
    with open('cats.txt', 'r') as cats_file:
        print("Cats:")
        print(cats_file.read())
        
    with open('dogs.txt', 'r') as dogs_file:
        print("Dogs:")
        print(dogs_file.read())
        
except FileNotFoundError:
    print("One of the files could not be found.")

(2) 添加try-except代码块：

try:
    with open('cats.txt', 'r') as cats_file:
        print("Cats:")
        print(cats_file.read())
        
    with open('dogs.txt', 'r') as dogs_file:
        print("Dogs:")
        print(dogs_file.read())
        
except FileNotFoundError:
    print("One of the files could not be found.")

(3) 移动一个文件：

假设我们将`cats.txt`文件移动到另一个目录，我们可以通过修改文件路径来测试`except`代码块的执行：

try:
    with open('cats.txt', 'r') as cats_file:
        print("Cats:")
        print(cats_file.read())
        
    with open('dogs.txt', 'r') as dogs_file:
        print("Dogs:")
        print(dogs_file.read())
        
except FileNotFoundError:
    print("One of the files could not be found.")