input: Write a python function to create a Car object and verify its properties using assert statements.
  assert car.get_make() == 'Toyota'
  assert car.get_model() == 'Corolla'
  assert car.get_year() == 2020
  assert car.get_color() == 'Blue'
  assert car.get_mileage() == 15000
  car.set_mileage(20000)
  assert car.get_mileage() == 20000
output: class Car:
      def __init__(self, make, model, year, color, mileage):
          self.make = make
          self.model = model
          self.year = year
          self.color = color
          self.mileage = mileage
  
      def get_make(self):
          return self.make
  
      def get_model(self):
          return self.model
  
      def get_year(self):
          return self.year
  
      def get_color(self):
          return self.color
  
      def get_mileage(self):
          return self.mileage
  
      def set_mileage(self, mileage):
          self.mileage = mileage
  
  # Create a Car object
  car = Car('Toyota', 'Corolla', 2020, 'Blue', 15000)
  
  # Verify the Car properties using assert statements
  assert car.get_make() == 'Toyota'
  assert car.get_model() == 'Corolla'
  assert car.get_year() == 2020
  assert car.get_color() == 'Blue'
  assert car.get_mileage() == 15000
  car.set_mileage(20000)
  assert car.get_mileage() == 20000