引用：in中問候NameError：

Question

有人可以幫我解決這個問題嗎？
我收到此消息：

Traceback: in in greet NameError: global name 'name' is not defined

由此：

class Person:
    def __init__(self, name):
        self.name = name
    def greet(self, other_name):
        return "Hi {0}, my name is {1}".format(other_name, name)

Answer 1

name在歡迎功能中超出范圍。 您需要改用self.name 。 例如

class Person:
    def __init__(self, name):
        self.name = name
    def greet(self, other_name):
        self.other_name = other_name
        return "Hi {0}, my name is {1}".format(other_name, self.name)

您可以驗證它是否有效

>>> mitch = Person('mitch')
>>> mitch.greet('mitchell') # prints 'Hi mitchell, my name is mitch'
>>> mitch.name # prints 'mitch'
>>> mitch.other_name # prints 'mitchell'

Answer 2

name是Person類的實例屬性。 意思是，您需要在其前面加上self. 獲得其價值：

return "Hi {0}, my name is {1}".format(other_name, self.name)
#                                                  ^^^^^