input: Write a function to generate a random number in the range [0, 10) using Python's built-in random module. The function should return the generated number.
  assert generate_random_number() in range(10)
  assert generate_random_number() in range(10)
  assert generate_random_number() in range(10)
  assert generate_random_number() in range(10)
  
  Note: As the output is random, the assertion checks if the number is within the specified range, but cannot check for specific values.
output: import random
  
  def generate_random_number():
      return random.randint(0, 9)