晓语听风

摘要： ''' #data = open("yesterday",encoding="utf-8").read() f = open("yesterday2",'a',encoding="utf-8") #文件句柄 #a = append 追加 f.write("\nwhen i was young i listen to the radio\n") data = f.read() print('--... 阅读全文

摘要： list_1 = [1,4,5,7,3,6,7,9] list_1 = set(list_1) list_2 =set([2,6,0,66,22,8,4]) print(list_1,list_2) ''' #交集 print( list_1.intersection(list_2) ) #并集 print(list_1.union(list_2)) #差集 in list_1 but ... 阅读全文