Python 如何将字符串和变量分配给变量_Python_String_Variables_Object

Python 如何将字符串和变量分配给变量

python string variables object

Python 如何将字符串和变量分配给变量,python,string,variables,object,Python,String,Variables,Object,我不完全确定问题是什么，但我需要这个来打印我的鸟对象这是python给我的错误： class Bird: def __init__(self): self.noise = "chirping" self.beak = "closed" self.wings = "closed" def __str__(self): msg = "The bird is ", self.noise "its beak is ",

我不完全确定问题是什么，但我需要这个来打印我的鸟对象

这是python给我的错误：

class Bird:
    def __init__(self):
        self.noise = "chirping"
        self.beak = "closed"
        self.wings = "closed"
    def __str__(self):
        msg = "The bird is ", self.noise "its beak is ", 
               self.beak "its wings are ", self.wings
        return msg
mybird = Bird()
print(mybird)

回溯（最近一次呼叫最后一次）：
文件“D:/000-Python Coding/Practice/bird object program.py”，第10行，在
印刷品（mybird）
TypeError:\uuuuu str\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

您可以添加

字符串：

Traceback (most recent call last):

  File "D:/000- Python-Coding/Practice/ bird object program.py", line 10, in <module>

   print(mybird)

TypeError: __str__ returned non-string (type tuple)

您可以添加

字符串：

Traceback (most recent call last):

  File "D:/000- Python-Coding/Practice/ bird object program.py", line 10, in <module>

   print(mybird)

TypeError: __str__ returned non-string (type tuple)

使用它连接字符串：

msg = "The bird is " + self.noise + " its beak is " + self.beak + " its wings are " + self.wings

所以看起来是这样的：

 msg = "The bird is " + self.noise + "its beak is " + self.beak + "its wings are " + self.wings

输出：

class Bird:
    def __init__(self):
        self.noise = "chirping"
        self.beak = "closed"
        self.wings = "closed"
    def __str__(self):
        msg = "The bird is " + self.noise + "its beak is " + self.beak + "its wings are " + self.wings
        return msg
mybird = Bird()
print(mybird)

使用它连接字符串：

msg = "The bird is " + self.noise + " its beak is " + self.beak + " its wings are " + self.wings

所以看起来是这样的：

 msg = "The bird is " + self.noise + "its beak is " + self.beak + "its wings are " + self.wings

输出：

class Bird:
    def __init__(self):
        self.noise = "chirping"
        self.beak = "closed"
        self.wings = "closed"
    def __str__(self):
        msg = "The bird is " + self.noise + "its beak is " + self.beak + "its wings are " + self.wings
        return msg
mybird = Bird()
print(mybird)

如错误消息所述：

The bird is chirpingits beak is closedits wings are closed

您正在构建元组而不是字符串，因此我建议使用字符串格式，如下所示：

TypeError: __str__ returned non-string (type tuple)

如错误消息所述：

The bird is chirpingits beak is closedits wings are closed

您正在构建元组而不是字符串，因此我建议使用字符串格式，如下所示：

TypeError: __str__ returned non-string (type tuple)

告诉你一切

TypeError: __str__ returned non-string (type tuple)

上面用逗号分隔会创建一个元组

（item1，item2，…）

您需要的是字符串与

的连接，或者如其他答案所示的字符串格式

告诉你一切

TypeError: __str__ returned non-string (type tuple)

上面用逗号分隔会创建一个元组

（item1，item2，…）

您需要的是与

的字符串连接或其他答案中显示的字符串格式。

问题在于

msg

不是

str

（字符串），而是元组。事实上：

        msg = "The bird is ", self.noise "its beak is ", self.beak "its wings are ", self.wings

是以逗号分隔的表达式列表，Python将其解释为：

msg = "The bird is ", self.noise "its beak is ", self.beak "its wings are ", self.wings

您可能希望附加可以使用plus（

）运算符执行的部分：

msg = ("The bird is ", self.noise "its beak is ", self.beak "its wings are ", self.wings)

或者您可以使用：