Fibonnaci Checker

basic_fib_checker.py

def Fib_Checker(lst):
    size = len(lst)

    if size == 0:
        return False
    
    start = lst[0]

    previous, current = 0, 1

    while current < start:
        current, previous = previous + current, current

    for i in range(size):
        if current != lst[i]:
            return False
        current, previous = previous + current, current
    
    return True