构建Message类及print重载

好的，下面是构建Message类及print重载的代码示例：

class Message:
    def __init__(self, text):
        self.text = text

    def __str__(self):
        return self.text

    def __repr__(self):
        return f"Message({self.text})"

    def __len__(self):
        return len(self.text)

    def __add__(self, other):
        return Message(self.text + other.text)

    def __eq__(self, other):
        return self.text == other.text

    def __lt__(self, other):
        return len(self.text) < len(other.text)

    def __gt__(self, other):
        return len(self.text) > len(other.text)

    def __le__(self, other):
        return len(self.text) <= len(other.text)

    def __ge__(self, other):
        return len(self.text) >= len(other.text)

    def __contains__(self, item):
        return item in self.text

    def __getitem__(self, index):
        return self.text[index]

    def __setitem__(self, index, value):
        self.text = self.text[:index] + value + self.text[index+1:]

    def __delitem__(self, index):
        self.text = self.text[:index] + self.text[index+1:]

    def __iter__(self):
        return iter(self.text)

    def __reversed__(self):
        return Message(self.text[::-1])

    def __call__(self):
        print(self.text)

msg1 = Message("Hello, World!")
msg2 = Message("Goodbye, World!")
print(msg1)  # Hello, World!
print(msg2)  # Goodbye, World!
print(len(msg1))  # 13
print(msg1 + msg2)  # Hello, World!Goodbye, World!
print(msg1 == msg2)  # False
print(msg1 < msg2)  # True
print(msg1 > msg2)  # False
print("Hello" in msg1)  # True
print(msg1[0])  # H
msg1[0] = "J"
print(msg1)  # Jello, World!
del msg1[0]
print(msg1)  # ello, World!
for char in msg1:
    print(char)
reversed_msg1 = reversed(msg1)
print(reversed_msg1)  # ,dlroW olle
reversed_msg1()

希望这个代码示例能够帮助你！