class A:
def func(self):print('a')
class B(A):
def func(self):print('b')
b = B()
b.func() # b 自己有不用父类的
class A:
def func(self):print('a')
class B(A):pass
b = B()
b.func() # a 自己没有用父类的
class A:
def func(self):print('a')
class B(A):
def func(self):
A.func(self)
print('b')
b = B()
b.func() # a,b 先执行B.func,调用了A.func打印a,然后回到B.func打印b
class A:
def func(self):print('a')
class B(A):
def func(self):
print('b')
A.func(self)
b = B()
b.func() # b,a
class A:
lst = []
def func(self):
self.lst.append(1)
class B(A):
lst = []
def func(self):
self.lst.append(2)
b = B()
b.func()
print(A.lst) # []
print(B.lst) # [2]
class A:
lst = []
def func(self):
self.lst.append(1)
class B(A):
def func(self):
self.lst.append(2)
b = B()
b.func()
print(A.lst) # [2]
print(B.lst) # [2]
class A:
lst = []
def __init__(self):
self.lst = []
def func(self):
self.lst.append(1)
class B(A):
def __init__(self):
self.lst= []
def func(self):
self.lst.append(2)
b = B()
b.func()
print(A.lst) # []
print(B.lst) # []