5 examples of 'python fibonacci generator' in Python

6
def 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
38
def 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)

14
def 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)

6
def 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')

210
def _create_fibonacci_points(n):
211
    """
212
    Get an array of approximately equidistant points on a sphere surface
213
    using a golden section spiral.
214
    """
215
    phi = (3 - np.sqrt(5)) * np.pi * np.arange(n)
216
    z = np.linspace(1 - 1.0/n, 1.0/n - 1, n)
217
    radius = np.sqrt(1 - z*z)
218
    coords = np.zeros((n, 3))
219
    coords[:,0] = radius * np.cos(phi)
220
    coords[:,1] = radius * np.sin(phi)
221
    coords[:,2] = z
222
    return coords