'''切片复制时的id值与直接赋值的列表不一样'''list_pratisce = [5,6,8,9,19]list_pratisce_backup = list_pratiscelist_pratisce_backup_qiepian = list_pratisce[:]print('list_pratisce的值是:',id(list_pratisce),'list_pratisce_backup的值是:',id(list_pratisce_backup),'list_pratisce_backup_qiepian',id(list_pratisce_backup_qiepian))

打印结果：
list_pratisce的值是: 2028711862920
list_pratisce_backup的值是: 2028711862920
list_pratisce_backup_qiepian的值是: 2028711862984