python-增删改查，,###增删改查nam

python-增删改查，,###增删改查nam

###增删改查names = ["zhangding","wangxu","wudong","cheng"]#增names.append("zhangzhengxin")  #增加print(names)names.insert(2,"liu")  #插入names.insert(1,"shun")print(names)#删#names.remove("liu")#del names[3]print(names.pop())print(names)#改names[2] = "王旭"print(names[0::2])#查print(names[-2])print(names[0:])print(names[-3:]) #get the last 3 elementprint(names[:3])  #get the first 3 elementprint(names.index("王旭"))   #取元素的下标#两个列表的合并n2=["jack","rain","1","6","50","B","*"]names.extend(n2)print(names,n2)names.reverse()  #旋转print(names)names.sort()   #排序print(names)n3 = names.copy() #copyn4 = namesprint((n3),id(names),id(n3))print(n4,id(names),id(n4))names.pop()print("------------")print(n3,id(names),id(n3))print(n4,id(names),id(n4))

python-增删改查