5 examples of 'sum of fibonacci series in python using for loop' in Python

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14def fibonacci(x: int):
15 if x < 0:
16 return -1
17 if x == 0:
18 return 0
19 cache = [0] * (x + 1)
20 for i in range(1, len(cache)):
21 cache[i] = -1
22 cache[1] = 1
23 return fibonacci_recur(x, cache)
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6def fibonacci_partial_sum_naive(from_, to):
7 if to <= 1:
8 return to
9
10 previous = 0
11 current = 1
12
13 for _ in range(from_ - 1):
14 previous, current = current, previous + current
15
16 sum = current
17
18 for _ in range(to - from_):
19 previous, current = current, previous + current
20 sum += current
21
22 return sum % 10
6def py_fibonacci(n):
7 """https://stackoverflow.com/a/52133289/2536357"""
8 i = 0
9 nextterm = 1
10 present = 1
11 previous = 0
12
13 while i < n:
14 nextterm = present + previous
15 present = previous
16 previous = nextterm
17 i = i + 1
18
19 return nextterm
37@tasklets.tasklet
38def fibonacci(n):
39 """A recursive Fibonacci to exercise task switching."""
40 if n <= 1:
41 raise tasklets.Return(n)
42 a = yield fibonacci(n - 1)
43 b = yield fibonacci(n - 2)
44 raise tasklets.Return(a + b)
6def test_fib(self, func):
7 result = []
8 expected = [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
9 for i in range(len(expected)):
10 result.append(func(i))
11 assert_equal(result, expected)
12 print('Success: test_fib')

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