面向对象中有关变量的练习题

第一题：

class StarkConfig(object):
    list_display = []

    def get_list_display(self):
        self.list_display.insert(0,33)
        return self.list_display

class RoleConfig(StarkConfig):
    list_display = [11,22]


s1 = StarkConfig()

result1 = s1.get_list_display()
print(result1) # 33

result2 = s1.get_list_display()
print(result2) # 33 33



class StarkConfig(object):
    def __init__(self):
        self.list_display = []

    def get_list_display(self):
        self.list_display.insert(0, 33)
        return self.list_display


class RoleConfig(StarkConfig):
    list_display = [11, 22]


s1 = StarkConfig()

result1 = s1.get_list_display()
print(result1)  # 33

result2 = s1.get_list_display()
print(result2)  # 33 33


class StarkConfig(object):
    def __init__(self):
        self.list_display = []

    def get_list_display(self):
        self.list_display.insert(0, 33)
        return self.list_display


class RoleConfig(StarkConfig):
    list_display = [11, 22]


s1 = StarkConfig()
s2 = StarkConfig()

result1 = s1.get_list_display()
print(result1)  # 33

result2 = s2.get_list_display()
print(result2)  # 33



class StarkConfig(object):
    list_display = []

    def get_list_display(self):
        self.list_display.insert(0, 33)
        return self.list_display


class RoleConfig(StarkConfig):
    list_display = [11, 22]


s1 = StarkConfig()
s2 = StarkConfig()

result1 = s1.get_list_display()
print(result1)  # 33

result2 = s2.get_list_display()
print(result2)  # 33 33

# 第二题：

class StarkConfig(object):
    list_display = []

    def get_list_display(self):
        self.list_display.insert(0,33)
        return self.list_display

class RoleConfig(StarkConfig):
    list_display = [11,22]


s1 = StarkConfig()
s2 = StarkConfig()

result1 = s1.get_list_display()
print(result1)

result2 = s2.get_list_display()
print(result2)

# 第三题：

class StarkConfig(object):
    list_display = []

    def get_list_display(self):
        self.list_display.insert(0,33)
        return self.list_display

class RoleConfig(StarkConfig):
    list_display = [11,22]


s1 = StarkConfig()
s2 = RoleConfig()

result1 = s1.get_list_display()
print(result1)

result2 = s2.get_list_display()
print(result2)

# 第四题：

class StarkConfig(object):
    list_display = []

    def get_list_display(self):
        self.list_display.insert(0,33)
        return self.list_display

class RoleConfig(StarkConfig):
    list_display = [11,22]


s1 = RoleConfig()
s2 = RoleConfig()

result1 = s1.get_list_display()
print(result1)

result2 = s2.get_list_display()
print(result2)