python add unique to list

1myList = ['Arise', 'But', 'It', 'Juliet', 'Who', 'already', 'and', 'and', 'and', 
2     'breaks', 'east', 'envious', 'fair', 'grief', 'is', 'is', 'is', 'kill', 'light', 
3     'moon', 'pale', 'sick', 'soft', 'sun', 'sun', 'the', 'the', 'the', 
4     'through', 'what', 'window', 'with', 'yonder']
5
6auxiliaryList = []
7for word in myList:
8    if word not in auxiliaryList:
9        auxiliaryList.append(word)