class Animal():
_count=0
@classmethod
def get_count(cls):
Animal._count+=1
return cls._count
print(Animal.get_count())
print(Animal.get_count())
_count=0
@classmethod
def get_count(cls):
Animal._count+=1
return cls._count
print(Animal.get_count())
print(Animal.get_count())
2021-04-11
class Animal(object):
def __init__(self, name, age):
self.name = name
self.age = age
dog = Animal("小黃", 2)
cat = Animal("小花", 3)
print(dog.name,dog.age)
print(cat.name,cat.age)
def __init__(self, name, age):
self.name = name
self.age = age
dog = Animal("小黃", 2)
cat = Animal("小花", 3)
print(dog.name,dog.age)
print(cat.name,cat.age)
2021-04-09
class Animal():
count=0
def __init__(self,name,age):
self.name=name
self.age=age
Animal.count+=1
dog=Animal('wangwang','2years old')
cat=Animal('mimi','1yeaes old')
print(Animal.count)
count=0
def __init__(self,name,age):
self.name=name
self.age=age
Animal.count+=1
dog=Animal('wangwang','2years old')
cat=Animal('mimi','1yeaes old')
print(Animal.count)
2021-04-09
class Animal():
def __init__(self,name,age):
self.name=name
self.age=age
dog=Animal('wangcai','3歲')
cat=Animal('mimi','2歲')
print(dog.name,dog.age)
print(cat.name,cat.age)
def __init__(self,name,age):
self.name=name
self.age=age
dog=Animal('wangcai','3歲')
cat=Animal('mimi','2歲')
print(dog.name,dog.age)
print(cat.name,cat.age)
2021-04-08
class Dog():
pass
class Cat():
pass
dog=Dog()
cat=Cat()
print(dog)
print(cat)
print(dog==cat)
pass
class Cat():
pass
dog=Dog()
cat=Cat()
print(dog)
print(cat)
print(dog==cat)
2021-04-08
class Animal(object):
def __init__(self, name, age):
self.name = name
self.age = age
dog = Animal('DD', 2)
cat = Animal('CC', 3)
print(dog.name + '--' + str(dog.age))
print(cat.name + '--' + str(cat.age))
def __init__(self, name, age):
self.name = name
self.age = age
dog = Animal('DD', 2)
cat = Animal('CC', 3)
print(dog.name + '--' + str(dog.age))
print(cat.name + '--' + str(cat.age))
2021-03-04
class animal:pass
dog=animal()
cat=animal()
dog.name = 'wangwang'
dog.sex = 'girl'
dog.age = 13
cat.name = "miaomiao"
cat.sex = 'boy'
cat.age = 6
print(dog.name,dog.age,dog.sex)
print(cat.name,cat.age,cat.sex)
dog=animal()
cat=animal()
dog.name = 'wangwang'
dog.sex = 'girl'
dog.age = 13
cat.name = "miaomiao"
cat.sex = 'boy'
cat.age = 6
print(dog.name,dog.age,dog.sex)
print(cat.name,cat.age,cat.sex)
2021-02-25
a,b=b,a+b 相當(dāng)于:
temp=b #先保存b的原值
b=a+b #賦b新值
a=temp #將b的原值賦予a
實(shí)際就是C語言中的數(shù)據(jù)交換過程,也可理解為先計算右邊后賦值。
temp=b #先保存b的原值
b=a+b #賦b新值
a=temp #將b的原值賦予a
實(shí)際就是C語言中的數(shù)據(jù)交換過程,也可理解為先計算右邊后賦值。
2021-02-25
需要注意的點(diǎn)
b = a + b
a = b
≠
a, b = b, a + b
b = a + b
a = b
≠
a, b = b, a + b
2021-02-25
namelist = ['alice', 'BOB', 'CanDY']
def f(l):
return l.capitalize()
for item in map(f,namelist):
print(item)
def f(l):
return l.capitalize()
for item in map(f,namelist):
print(item)
2021-02-12