input: Write a function to generate a random number between two given numbers (inclusive). The function should take two integers as input and return a random integer between these two numbers.
  assert random_number_generator(2, 5)== 2 or 3 or 4 or 5
  assert random_number_generator(-10, 10)== -10 or -9 or -8 or -7 or -6 or -5 or -4 or -3 or -2 or -1 or 0 or 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10
output: import random
  
  def random_number_generator(a, b):
      return random.randint(a, b)