python中的无限Fibonacci生成器,产量误差？

Question

def fib_gen():
    a, b = 0, 1
    while True:
        yield a
        a, b = b, a + b

print(next(fib_gen())) 
print(next(fib_gen())) 
print(next(fib_gen())) 
print(next(fib_gen()))

Output: 0 
        0 
        0 
        0

我试图在python中创建一个无限的Fibonacci生成器.请帮忙......我哪里做错了？

Answer 1

每次调用fib_gen()都会创建一个处于初始状态的新生成器.尝试将返回值fib_gen()赋给变量并调用next()同一个变量.

Answer 2

首先需要创建一个生成器对象:

def fib_gen():
    a, b = 0, 1
    while True:
        yield a
        a, b = b, a + b


generator = fib_gen()

print(next(generator))
print(next(generator))
print(next(generator))
print(next(generator))

输出是:

0
1
1
2