自己改成你需要的
# 递归 @lru_cache(None) def fibo1(n): return n if n <= 1 else fibo1(n - 1) + fibo1(n - 2) # 递推 def fibo2(n): if n <= 1: return n one, two = 0, 1 for i in range(1, n): one, two = two, one + two return two