python实例属性的查找顺序

class Myclass:
    """My class """
    heighe = 180
    age = 18
    def __init__(self,name,age=20):
        self.name = name
        self.age = age
 
 
 
jerry = Myclass("jerry",20)
tom = Myclass("tom")
 
#Myclass.age = 50
print(Myclass.age,tom.age,jerry.age)  # 50 20 20
 
print(Myclass.heighe,tom.heighe,jerry.heighe)   #   180 180 180
#jerry.heighe = 170
print(Myclass.heighe,tom.heighe,jerry.heighe)   #   180 180 170
 
#tom.heighe +=10
print(Myclass.heighe,tom.heighe,jerry.heighe)   #   180 190 180
 
#Myclass.heighe += 20
print(Myclass.heighe,tom.heighe,jerry.heighe)   #   200 200 200
 
Myclass.weight = 90
print(Myclass.weight,tom.weight,jerry.weight)  #    90 90 90
 
print(Myclass.__dict__["age"])  #   18
print(jerry.__dict__["age"])    #   20
print(tom.__dict__["heighe"])   #   KeyError: 'heighe'
print(Myclass.__dict__["weight"])   #   90