input: 
  def find_primes(limit: int) -> List[int]:
      """ Find all prime numbers from 2 up to a given limit.
      >>> find_primes(10)
      [2, 3, 5, 7]
      >>> find_primes(20)
      [2, 3, 5, 7, 11, 13, 17, 19]
      """
      def is_prime(num: int) -> bool:
          for i in range(2, int(num ** 0.5) + 1):
              if num % i == 0:
                  return False
          return True
  
      primes = []
      for n in range(2, limit + 1):
          if is_prime(n):
              primes.append(n)
      return primes
  
output:     primes = []
      for n in range(2, limit + 1):
          if is_prime(n):
              primes.append(n)
      return primes