Returns the n maximum elements from the provided list.
If n is greater than or equal to the provided list’s length, then return the original list (sorted in descending order).

Use sorted() to sort the list, [:n] to get the specified number of elements.
Omit the second argument, n, to get a one-element list.

代码实现

def max_n(lst, n=1):
  return sorted(lst, reverse=True)[:n]

使用样例

max_n([1, 2, 3]) # [3]
max_n([1, 2, 3], 2) # [3,2]