1、子類定義的時(shí)候，需要在括號(hào)內(nèi)寫明繼承的類；
2、在__init__()方法，需要調(diào)用super(Student, self).__init__(name, gender)，來初始化從父類繼承過來的屬性；
2、在__init__()方法，需要調(diào)用super(Student, self).__init__(name, gender)，來初始化從父類繼承過來的屬性；
2022-09-24
# Enter a code
class Animal(object):
count = 0
def __init__(self,name,age):
self.name = name
self.age = age
Animal.count += 1
dog = Animal('wangwang',1)
print(Animal.count)
cat = Animal('mimi',3)
print(Animal.count)
class Animal(object):
count = 0
def __init__(self,name,age):
self.name = name
self.age = age
Animal.count += 1
dog = Animal('wangwang',1)
print(Animal.count)
cat = Animal('mimi',3)
print(Animal.count)
2022-09-03
# Enter a code
class Animal(object):
count = 0
def __init__(self,name,age):
self.name = name
self.age = age
Animal.count += 1
dog = Animal('wangwang',1)
cat = Animal('mimi',3)
print(dog.count)
print(cat.count)
class Animal(object):
count = 0
def __init__(self,name,age):
self.name = name
self.age = age
Animal.count += 1
dog = Animal('wangwang',1)
cat = Animal('mimi',3)
print(dog.count)
print(cat.count)
2022-09-03
# Enter a code
class Animal(object):
def __init__(self,name,age):
self.name = name
self.age = age
dog = Animal('dog',1)
cat = Animal('cat',2)
print(dog.name,dog.age)
print(cat.name,cat.age)
class Animal(object):
def __init__(self,name,age):
self.name = name
self.age = age
dog = Animal('dog',1)
cat = Animal('cat',2)
print(dog.name,dog.age)
print(cat.name,cat.age)
2022-08-31
# Enter a code
class Animal():
pass
dog = Animal()
cat = Animal()
print(dog)
print(cat)
print(dog == cat)
class Animal():
pass
dog = Animal()
cat = Animal()
print(dog)
print(cat)
print(dog == cat)
2022-08-30
class Animal(object):
__age = 2
def __init__(self, name, age):
self.name = name
cat = Animal('Kitty', '3')
print(cat.name)
print(cat._Animal__age)
__age = 2
def __init__(self, name, age):
self.name = name
cat = Animal('Kitty', '3')
print(cat.name)
print(cat._Animal__age)
2022-08-08
最贊回答 / 土斤土斤
這是一種代碼簡寫的方式，稱之為推導(dǎo)式，是通過一行代碼完成循環(huán)判斷，并遍歷出一系列數(shù)據(jù)的編寫代碼方式。語法為：成員 for 循環(huán) ... if 判斷 ...而例子中的是為推導(dǎo)式中的一種類型，為列表推導(dǎo)式，結(jié)果是一個(gè)列表：?[item for item in Iterable]所以 result = [item for item in map(lambda x: x * x, [1, 2, 3, 4, 5, 6, 7, 8, 9])] 是這一段的簡寫：result = []for i in? map(lamb...
2022-07-31