Question

我正在自学python类，当我运行代码时出现以下错误：

    class Critter(object):
        """A virtual pet"""
            def _init_(self, name, mood):
                print("A new critter has been born!!!!!")
                self.name = name
                self.__mood = mood 

           def talk(self):
           print("\n Im",self.name)
           print("Right now I feel",self._mood)

           def _private_method(self):
               print("this is a private method")

           def public(self):
               print("This is a public method. ")
               self._private_method( )

crit = Critter(name = "Poochie", mood = "happy")
crit.talk( )crit.public_method( )

input("Press enter to leave")

我收到错误：

    Traceback (most recent call last):
File "/Users/calebmatthias/Document/workspace/de.vogella.python.first/practice.py", line   27, in <module>
    crit = Critter(name = "Poochie", mood = "happy")
TypeError: object.__new__() takes no parameters

Answer 1

我建议您更仔细地格式化提交内容。 Python非常挑剔缩进 - 请阅读PEP8，了解如何正确格式化Python代码。

问题是您拼错__init__错误。你有_init_这只是Python的另一种方法。

Answer 2

请注意，以下更正的代码运行正常（_init_更改为__init__; _mood更改为__mood; public_method更改为public;缩进更正）：

class Critter(object):
    """A virtual pet"""
    def __init__(self, name, mood):
        print("A new critter has been born!!!!!")
        self.name = name
        self.__mood = mood 

    def talk(self):
        print("\n Im",self.name)
        print("Right now I feel",self.__mood)

    def _private_method(self):
        print("this is a private method")

    def public(self):
        print("This is a public method. ")
        self._private_method( )

crit = Critter(name="Poochie", mood="happy")
crit.talk()
crit.public()

input("Press enter to leave")

...和输出：

A new critter has been born!!!!!

 Im Poochie
Right now I feel happy
This is a public method. 
this is a private method
Press enter to leave

我一直在收到类型错误

2 个答案: