Lecture 5 - Lists

Question 1

Lists are ____ and ____ type of objects

Answer 1

mutable, container

Question 2

What are the similarities between lists and strings

Answer 2

• len (counts characters in strings and objects in lists)!
• indexing
• slicing
• appending with + (concatenation)
• repeating with *
• may be empty
• can be compared for equality and ordering

Question 3

What are the differences between lists and strings

Answer 3

• strings are immutable, lists are mutable
• strings only contain characters, lists may contain any
object type
• they support many different methods, e.g.
• string has .upper() but list does not
• list supports .append() but string does not

Question 4

What is the difference between x.sort and sorted (x)

Answer 4

x.sort ( ) sorts the objects in the memory, mutates the list - permanent sorting
sorted (x) - outputs a sorted list as a result of it (function) being called does not make any changes to the original list.

Question 5

Range

Answer 5

range (start, stop, stride)
you always include the start value and always exclude the stop value
NEVER TAKE THE STOP VALUE