print("-------2、生成器的创建----")

# -*- coding: UTF-8 -*-
gen= (x * x for x in range(10))
print(gen)


print("-------3、遍历生成器的元素----")

# -*- coding: UTF-8 -*-
gen= (x * x for x in range(10))

for num  in  gen :
    print(num)


print("-------4、以函数的形式实现生成器----")

# -*- coding: UTF-8 -*-
def my_function():
    for i in range(10):
        print ( i )

my_function() 


# -*- coding: UTF-8 -*-
def my_function():
    for i in range(10):
        yield i

print(my_function()) 

# -*- coding: UTF-8 -*-
def fibon(n):
    a = b = 1
    for i in range(n):
        yield a
        a, b = b, a + b

# 引用函数
for x in fibon(100):
    print(x , end = ' ')


# -*- coding: UTF-8 -*-
def odd():
    print ( 'step 1' )
    yield ( 1 )
    print ( 'step 2' )
    yield ( 3 )
    print ( 'step 3' )
    yield ( 5 )

o = odd()
print( next( o ) ) 
print( next( o ) ) 
print( next( o ) ) 


print("-------5、打印杨辉三角----")

# -*- coding: UTF-8 -*-
def triangles( n ):         # 杨辉三角形
    L = [1]
    while True:
        yield L
        L.append(0)
        L = [ L [ i -1 ] + L [ i ] for i in range (len(L))]

n= 0
for t in triangles( 10 ):   # 直接修改函数名即可运行
    print(t)
    n = n + 1
    if n == 10:
        break