>>> s = [True, False, True]
>>> s.count(True) > s.count(False)
True
>>> s = [True, False, False]
>>> s.count(True) > s.count(False)
False

 >>> arr = [1, 1]
>>> def phi(n, arr):
...     f1, f2 = arr[-2],  arr[-1]
...     for x in range(n):
...         f1, f2 = f2, f2+f1
...         arr.append(f2)
>>> phi(5, arr)
>>> arr
[1, 1, 2, 3, 5, 8, 13]