Intro to Python Exam 2 Questions & Answers.

Intro to Python Exam 2 Questions & Answers. Sequences - CORRECT ANSWER objects that can hold multiple items of data in order. You can then perform operations on sequences to examine and manipulate the items stored in them. What sequence types does Python use? - CORRECT ANSWER Lists, tuples Lists are mutable. What does this mean? - CORRECT ANSWER Their contents can be changed during program execution What are the different ways lists can be created? - CORRECT ANSWER [ ] with numbers and/or strings, along with using range (list(range(2, 22, 2))) What are Python's list operations? - CORRECT ANSWER + can join together two lists, * can repeat items in lists, in keyword returns True if item is in list What is the only way to change list items in a loop? - CORRECT ANSWER By index What numbers would you need in a range for 1-20? - CORRECT ANSWER range(1,21) How does slicing work in lists? - CORRECT ANSWER To start from first index [:6] To go to the end of the list [6:] [-5:] can make the list count backwards [:-5] will stop 5 items from end of the list [1::2] will provide a step value, skipping every other value What are the list methods? - CORRECT ANSWER Append, insert, sort, del, index, min/max How does append work in lists? - CORRECT ANSWER Use d to add an item onto the end of a list Ex. d("cats") will add "cats" onto the end of the list How does insert work in lists? - CORRECT ANSWER Adds an item to a particular position Ex. t(0, "cats") will add "cats" to the beginning of the list How does sort work in lists? - CORRECT ANSWER Sorts the list alphabetically (can only be used on all strings Ex. ( ) How does del work in lists? - CORRECT ANSWER Deletes the indexed object Ex. del list1[3] deletes fourth item in list How does index and remove work in lists? - CORRECT ANSWER Must use try and except block Ex. try: ("cats") except(ValueError):