python - 如何将我的属性类型之一更改为 int？

Question

对于一些背景信息，我试图让自己熟悉 Python 上的对象、类和属性。

class Plane:
def __init__(self,ModelName,brand,capacity):
    self.ModelName = ModelName
    self.brand = brand
    self.capacity = capacity

def intro_plane(self):
    print(
        "The name of the plane is " + self.ModelName + 
        ". It was released by " + self.brand +
        ". It has a capacity of " + self.capacity
        )
P1 = Plane("B737", "Boeing", 155)
P1.intro_plane()

我在 VsCode 上运行了我的代码，结果如下：

TypeError: can only concatenate str (not "int") to str

标签： pythonclassobjectattributes

Answer 1

capacity是一个int，不是一个string。因此，当您添加print功能时，您需要更改它的类型。

". It has a capacity of " + str(self.capacity)