input: Write a python function to convert temperature from Celsius to Fahrenheit and vice versa.
  assert convert_temperature(0, 'Celsius', 'Fahrenheit') == 32.0
  assert convert_temperature(32, 'Fahrenheit', 'Celsius') == 0.0
  assert convert_temperature(100, 'Celsius', 'Fahrenheit') == 212.0
  assert convert_temperature(212, 'Fahrenheit', 'Celsius') == 100.0
output: def convert_temperature(value, from_scale, to_scale):
      if from_scale == 'Celsius' and to_scale == 'Fahrenheit':
          return (value * 9/5) + 32
      elif from_scale == 'Fahrenheit' and to_scale == 'Celsius':
          return (value - 32) * 5/9
      else:
          raise ValueError("Invalid scale conversion")