print([i for i in range(1,101)])

# map:返回一个迭代器, 循环 类似于列表推导式的循环模式。
l1 = [1, 2, 3, 4, 5]
print([i**2 for i in l1])
iter3 = map(lambda x: x**2, l1)
print(list(iter3))

# 如果i可以整除3就返回一个*，else返回i
print(['*' if i % 3 == 0 else i for i in range(1,21)])

# 三十以内所有的偶数留到列表中
print([i for i in range(1,31) if i % 2 == 0])

# filter：返回一个迭代器  ***
# 过滤 类似于列表推导式的筛选模式。
l1 = [2, 4, 5, 6, 7, 8, 10]
iter2 = filter(lambda x: x % 2 == 0, l1)
for i in iter2:print(i)

def func():print(111)print(222)yield 666yield 777ret = func()
print(ret)
# 一个next 对应一个yield
print(next(ret))
print(next(ret))

def func():count = yield 666print(count)num = yield 'rock'print(num)yield 'wwww'n1 = yield 'fff'print(n1)
genor = func()
# print(next(genor))
# print(next(genor))
# # send不仅能对应yield取值，而且可以给上一个yield发送一个值
print(genor.send(None))
print(genor.send('888'))
print(genor.send('777'))
print(genor.send('111'))
# print(genor.send('222'))

def func():yield 3, 4, 5, 6genor = func()
print(next(genor))

# yield from 将一个可迭代对象变成一个迭代器返回
def func():lst = ['111', '222', '333', '444']yield from lstgenor = func()
print(next(genor))    # 111
print(next(genor))    # 222
print(next(genor))    # 333
for i in genor:print(i)

# 字符串
astr = 'ABC'
# 列表
alist = [1, 2, 3]
# 字典
adict = {"name": "wangbm", "age": 18}
# 生成器
agen = (i for i in range(4, 8))def gen(*args, **kw):for item in args:yield from itemnew_list = gen(astr, alist, adict, agen)
print(list(new_list))
# ['A', 'B', 'C', 1, 2, 3, 'name', 'age', 4, 5, 6, 7]