print('--------------类--------------')

class Person:

population = 0

def __init__(self, name, age):

self.name = name

self.age = age

Person.population += 1

def __str__(self):

return f'Person(name:{self.name},age:{self.age})'

def introduce_myself(self):

print(f"I'm {self.name}, I'm {self.age} years old.")

yitian = Person('yitian', 24)

yitian.introduce_myself()

zhang3 = Person('zhang3', 25)

print(yitian)

print(f'population:{Person.population}')

print('--------------类继承--------------')

class Student(Person):

def __init__(self, id, name, age):

Person.__init__(self, name, age)

self.id = id

def __str__(self):

return f'Student(id:{self.id},name:{self.name},age:{self.age})'

def introduce_myself(self):

print(f"I'm {self.name}, I'm {self.age} years old student.")

xiaoming = Student(1, 'xiaoming', 14)

print(xiaoming)

xiaoming.introduce_myself()

# 调用父类版本

Person.introduce_myself(xiaoming)

print('--------------继承关系--------------')

print(f'xiaoming is Student:{isinstance(xiaoming, Student)}')

print(f'xiaoming is Person:{isinstance(xiaoming, Person)}')

print(f'Student is Person:{issubclass(Student, Person)}')

print(f'Person is Student:{issubclass(Person, Student)}')

print('--------------结构体--------------')

class StudentInfo:

pass

info = StudentInfo()

info.name = 'yitian'

info.age = 24

info.gender = 'male'

print(f'info({info.name},{info.age},{info.gender})')

print('--------------迭代器--------------')

list1 = [1, 2, 3]

iter1 = iter(list1)

e1 = next(iter1)

e2 = next(iter1)

e3 = next(iter1)

print('List:', e1, e2, e3)

class IterableObj:

def __init__(self, data):

self.data = data

self.index = -1

def __iter__(self):

return self

def __next__(self):

if self.index == len(self.data) - 1:

raise StopIteration

self.index += 1

return self.data[self.index]

print('IterableObj:', end=' ')

obj1 = IterableObj([1, 2, 3])

for i in obj1:

print(i, end=' ')

print()

print('--------------生成器--------------')

def even_generator(data):

index = 0

while index < len(data):

if data[index] % 2 == 0:

yield data[index]

index += 1

integer_list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

print(f'even_generator:{[i for i in even_generator(integer_list)]}')

print('--------------生成器表达式--------------')

odd_generator = (i for i in range(1, 11) if i % 2 != 0)

odd_list = [i for i in range(1, 11) if i % 2 != 0]

print(f'generator type:{type(odd_generator)}')

print(f'list type:{type(odd_list)}')