lists are incredibly important in python this introduces you to the concepts used to createmanagesearchand print lists (among other taskswhen you complete the you can use lists to make your python applications more robustfasterand more flexible in factyou'll wonder how you ever got along without using lists in the past the important thing to keep in mind is that you have already used lists most of your life there really isn' any difference now except that you must now think about the actions that you normally take for granted when managing your own lists organizing information in an application people create lists to organize information and make it easier to access and change you use lists in python for the same reason in many situationsyou really do need some sort of organizational aid to hold data for exampleyou might want to create single place to look for days of the week or months of the year the names of these items would appear in listmuch as they would if you needed to commit them to paper in the real world the following sections describe lists and how they work in more detail defining organization using lists the python specification defines list as kind of sequence sequences simply provide some means of allowing multiple data items to exist together in single storage unitbut as separate entities think about one of those large mail holders you see in apartment buildings single mail holder contains number of small mailboxeseach of which can contain mail python supports other kinds of sequences as well discusses number of these sequences)tuples dictionaries stacks queues deques of all the sequenceslists are the easiest to understand and are the most directly related to real-world object working with lists helps you become better able to work with other kinds of sequences that provide greater functionality and improved flexibility the point is that the data is stored in list much as you would write it on piece of paper -one item comes after