关于python类和实例的一些尝试

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Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit (AMD64)] on win32Type "copyright", "credits" or "license()" for more information.>>> a=5>>> b=5>>> deTraceback (most recent call last):  File "<pyshell#2>", line 1, in <module>    deNameError: name 'de' is not defined>>> def x(a,b):    return a,b>>> x(a,b)(5, 5)>>> type(x(a,b))<class 'tuple'>>>> def y(a,b):    return [a,b]>>> y(a,b)[5, 5]>>> x(a,b)[0]5>>> class student(object):    def sum(self):        a=5        b=6        return a+b>>> student.sum<function student.sum at 0x0000025F1939A9D8>>>> class student(object):    def __init__(self):        self.a=5        self.b=6    def MySum(self):        return self.a+self.b>>> c=student.MySum>>> c<function student.MySum at 0x0000025F1939AAE8>>>> class student(object):    def MySum(self,a,b):        return a+b>>> c=student.MySum(5,6)Traceback (most recent call last):  File "<pyshell#31>", line 1, in <module>    c=student.MySum(5,6)TypeError: MySum() missing 1 required positional argument: 'b'>>> class student(object):    def __init__(self):        self.mySum=0    def MySum(self,a,b):        self.mySum=a+b        return self.mySum>>> c=student.MySum(5,6)Traceback (most recent call last):  File "<pyshell#35>", line 1, in <module>    c=student.MySum(5,6)TypeError: MySum() missing 1 required positional argument: 'b'>>> c=student()>>> c.MySum(5,6)11>>> class student(object):    def __init__(self,a,b):        self.mySum=a+b        return self.mySum>>> student(5,6)Traceback (most recent call last):  File "<pyshell#41>", line 1, in <module>    student(5,6)TypeError: __init__() should return None, not 'int'>>> class student(object):    def __init__(self,a,b):        self.mySum=a+b>>> student(5,6).mySum11>>>
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