我的方法返回值链接处的地址

如何解决我的方法返回值链接处的地址

这是一个不属于现场培训的练习，我不明白为什么当我想显示我的卫星类的能量方法的返回值时，我在控制台上收到一个地址。

>

Zoe satellite speed = 40.0m / s.
<bound method Satellite.energie of <__ main __. Satellite object at 0x01A5E610 >>
Zoe satellite speed = 70.0m / s.
<bound method Satellite.energie of <__ main __. Satellite object at 0x01A5E610 >>

这是我的代码：

class Satellite (object):
    "" "Satellite for instantiating objects simulating satellites
artificial launched into space,around the earth. "" "

    def __init __ (self,name,mass = 100,speed = 0):
        self.name = name
        self.mass = mass
        speed choke = speed

    def impulse (self,force,duration):
        "" "will vary the speed of the satellite." ""

        speed self = speed self + (force * duration) / mass self

    def energy (self):
        "" "will refer to the program calling the kinetic energy value of the satellite" ""
        return_val = self.mass * self.speed ** 2/2
        return return_val

    def display_speed (self):
        "" "will display the name of the satellite and its current speed." ""
        print ("satellite speed {0} = {1} m / s.". format (self.name,self.speed))


s1 = Satellite ('Zoe',mass = 250,speed = 10)
s1.pulse (500,15)
s1.display_speed ()
print (s1.energy)
s1.pulse (500,15)
s1.display_speed ()
print (s1.energy)

解决方法

你的 energy 方法是错误的，它应该给出了一个语法错误：

def energy (self):
    "" "will refer to the program calling the kinetic energy value of the satellite" ""
    return_val = self.mass * self.speed ** 2/2
    return return_val

更不用说，您还需要调用 energy 方法：

s1.pulse (500,15)
s1.display_speed ()
print(s1.energy())
s1.pulse (500,15)
s1.display_speed ()
print(s1.energy())

您试图覆盖 return 语句并将其用作变量，这是错误的。您的代码中还有其他错误输入/问题，但这个似乎绝对是主要问题。

,

您不是调用函数 Satellite.energy()，而是尝试访问属性 Satellite.energy - 如果将其更改为 print(s1.energy())，它应该会正确显示！

请注意，您的某些代码在此处格式错误，因此无法运行 - 这对我有用：

class Satellite (object):
    "" "Satellite for instantiating objects simulating satellites artificial launched into space,around the earth. "" "

    def __init__ (self,name,mass = 100,speed = 0):
        self.name = name
        self.mass = mass
        self.speed = speed

    def impulse (self,force,duration):
        "" "will vary the speed of the satellite." ""

        return self.speed + (force * duration) / self.mass

    def energy (self):
        "" "will refer to the program calling the kinetic energy value of the satellite" ""
        return self.mass * self.speed ** 2/2

    def display_speed (self):
        "" "will display the name of the satellite and its current speed." ""
        print ("satellite speed {0} = {1} m / s.". format (self.name,self.speed))


s1 = Satellite ('Zoe',mass = 250,speed = 10)
s1.impulse (500,15)
s1.display_speed ()
print (s1.energy())
s1.impulse (500,15)
s1.display_speed ()
print (s1.energy())