Python中小错误 之 object() takes no parameters

 class Person :    population=0    def __init__(self,name):        self.name=name        print ('Initializing %s'  % self.name)        Person.population+=1    def sayHi(self):        print ('hi，My name is %s.' % self.name)    def howMany(self):        if Person.population==1:            print ('I am the current population .')        else:            print ('We have  %d persons here ' % Person.population)swaroop=Person('Swaroop')swaroop.sayHi()swaroop.howMany()kalam=Person('Abdul kalam')kalam.sayHi()kalam.howMany()swaroop.sayHi()swaroop.howMany()

如上面Python代码，是学习python类时遇到的一个小例子。但是在运行时会报错：

Traceback (most recent call last):
File “E:/PythonStudy/objvar.py”, line 18, in
swaroop=Person(‘Swaroop’)
TypeError: object() takes no parameters

经过查阅资料才知道，是构造函数里的下划线的问题，

init(self,name)这个构造函数的左右下划线都是两个，我只用了一个，导致错误。