例如,如果我有:
a = ["apples", "bananas", "cucumbers", "bananas"]
我怎么能删除重复的"香蕉",以便:
a = ["apples", "bananas", "cucumbers"]
另外,如果我有:
a = ["apples", "bananas", "cucumbers"]
b = ["pears", "apples", "watermelons"]
我怎么能从两个列表中删除重复的"苹果",以便:
a = ["bananas", "cucumbers"]
b = ["pears", "watermelons"]