# -*- coding: utf-8 -*- # Copyright (c) 2018, Silvio Peroni # # Permission to use, copy, modify, and/or distribute this software for any purpose # with or without fee is hereby granted, provided that the above copyright notice # and this permission notice appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH # REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND # FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, # OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, # DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS # SOFTWARE. my_first_list = list() # this creates a new list my_first_list.append(34) # these two lines add two numbers my_first_list.append(15) # to the list in this precise order # currently my_first_list contains two elements: # list([ 34, 15 ]) # a list can contain items of any kind my_first_list.append("Silvio") # now my_first_list contains: # list([34, 15, "Silvio"]) # it removes the first instance of the number 34 my_first_list.remove(34) # my_first_list became: # list([15, "Silvio"]) # it add again all the items in my_first_list to the list itself my_first_list.extend(my_first_list) # current status of my_first_list: # list([15, "Silvio", 15, "Silvio"]) # it stores 4 in my_first_list_len my_first_list_len = len(my_first_list)