生成器以及 生成器之斐波那契

"""比如，著名的斐波拉契数列（Fibonacci），除第一个和第二个数外，任意一个数都可由前两个数相加得到：

1, 1, 2, 3, 5, 8, 13, 21, 34, …"""

def fib(max):
    a,b = 0,1
    n = 0
    while n <max:
        n = a + b
        a = b
        b = n
        yield n
f = fib(100)
print(f)
print(f.__next__())
print(f.__next__())
print(f.__next__())
print(f.__next__())
print(f.__next__())
for i in f:
    print(i)
# print(f.__next__())

# 生成器

a =[x*x for x in range(10)]
print(a)
a =(x*x for x in range(10))
print(a)
print(next(a))