input: Write a function that takes two numbers as input and generates a random number between them.
  assert random_number_generator(2, 5)>=2 and random_number_generator(2, 5)<=5
  assert random_number_generator(-10, 10)>=-10 and random_number_generator(-10, 10)<=10
  assert random_number_generator(0, 100)>=0 and random_number_generator(0, 100)<=100
  assert random_number_generator(-5, 0)>=-5 and random_number_generator(-5, 0)<=0
  assert random_number_generator(1, 1)==1
output: import random
  
  def random_number_generator(a, b):
      return random.randint(a, b)