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In [10]: a = [1,2,3,4,5]
In [12]: [i+1 for i in a]
Out[12]: [2, 3, 4, 5, 6]
In [18]: a = (i+1 for i in a)
In [19]: next(a)
Out[19]: 2
In [20]: next(a)
Out[20]: 3
In [21]: next(a)
Out[21]: 4
In [22]: next(a)
Out[22]: 5
In [23]: next(a)
Out[23]: 6
In [24]: next(a)
---------------------------------------------------------------------------
StopIteration Traceback (most recent call last)
<ipython-input-24-15841f3f11d4> in <module>
----> 1 next(a)
斐波那契数
In [32]: def fib(n):
...: count = 0
...: a = 0
...: b = 1
...: while count < n:
...: tmp = a
...: a = b
...: b = tmp + b
...: yield b
...: count += 1
In [35]: a = fib(20)
In [36]: next(a)
Out[36]: 1
In [37]: next(a)
Out[37]: 2
In [38]: next(a)
Out[38]: 3
In [39]: next(a)
Out[39]: 5
In [40]: next(a)
Out[40]: 8
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