Python 类中未定义全局名称

我遇到一个错误，称此程序中未定义全局名称。我已经尝试了我能想到的一切来调试这个，我仍然没有运气。我是面向对象编程的新手，因此非常感谢您对我的帮助

代码：

---

使用

accelerate

方法时，代码中出现缩进错误。以下是正确的代码：请同时查看我在您的代码中所做的所有其他编辑（注释）：

def main（）：

---

请发布完整的错误消息。除了未插入的

加速

，我没有收到任何错误消息，谢谢，我已经完成了所有这些编辑，结果是野马周围的''是我运行它所需要的，但现在它只是吐出零

def main():

    ford=Car(2008,mustang)
    count=0

    for count in range(5):
        ford.accelerate()
        count+=1
        print("The speed is : "+ford.get_speed())

    for count in range(5):
        ford.brake()
        count-=1
        print("The speed is : "+ford.get_speed())



class Car:

    def __init__(self,model,carMake):
        self.__yearModel=model
        self.__make=carMake
        self.__speed=0

    def set_Model(self, model):
        self.__yearModel=model

    def set_Make(self,carMake):
        self.__make=carMake

    def get_Model(self):
        return self.__yearModel 

    def get_speed(self):
        return self.__speed

    def get_make(self):
        return self.__make

def accelerate(self):
        return self.__speed+5

    def brake(self):
        return self.__speed-5

    ford=Car(2008,'mustang')       #mustang should be a string (in '')
    count=0

    for count in range(5):
        ford.accelerate()
        count+=1
        print("The speed is : "+str(ford.get_speed()))   #you must cast the int as str

    for count in range(5):
        ford.brake()
        count-=1
        print("The speed is : "+str(ford.get_speed()))   #you must cast the int as str

class Car:

    def __init__(self,model,carMake):
        self.__yearModel=model
        self.__make=carMake
        self.__speed=0

    def set_Model(self, model):
        self.__yearModel=model

    def set_Make(self,carMake):
        self.__make=carMake

    def get_Model(self):
        return self.__yearModel 

    def get_speed(self):
        return self.__speed

    def get_make(self):
        return self.__make

    def accelerate(self):
        self.__speed += 5           #you should actually increment your speed instead of returning it

    def brake(self):
        self.__speed -= 5           #you should actually decrement your speed instead of returning it


main()           #Call the main() method to make the script actually run