input: from typing import List
  
  def countEvenNum(list: List[int]) -> int:
      """Identify the number of even numbers present in a given list of numbers.
      >>> countEvenNum([1, 2, 3, 4, 5])
      2
      >>> countEvenNum([2, 4, 6, 8])
      4
      """
      return len([x for x in list if x % 2 == 0])
output:     return len([x for x in list if x % 2 == 0])