input: Write a python function to classify iris flowers based on sepal and petal measurements.
  assert classify_iris([4.9, 3.0, 1.4, 0.2]) == 'Iris setosa'
  assert classify_iris([6.3, 3.3, 6.0, 2.5]) == 'Iris virginica'
  assert classify_iris([5.8, 2.7, 4.1, 1.0]) == 'Iris versicolor'
output: def classify_iris(measurements):
      sepal_length, sepal_width, petal_length, petal_width = measurements
      if petal_length < 2.5:
          return 'Iris setosa'
      elif petal_width < 1.8:
          return 'Iris versicolor'
      else:
          return 'Iris virginica'