# 交集intersection a&b 、聯集union a｜b、差集difference a-b、對稱集symmetric a^b ''' P57-58''' asiacountry={"China", "Japan", "Korea"} worldcountry={"Germany", "China", "Spain", "Italy", "Japan"} print(asiacountry) print(worldcountry) country=asiacountry & worldcountry print(country) country=asiacountry.intersection(worldcountry) print(country) '''country=asiacountry｜worldcountry print(country)''' country=asiacountry.union(worldcountry) print(country)