Chapter 7: Lists

list = [item1, item2, etc.]

List: an object that contains multiple data items

list[start : end] #If start not specified, 0 is used for start index #If end not specified, len(list) is used for end index

Slice: a span of items that are taken from a sequence - List slicing format: list[start : end]

item in list #usualy in the context of a loop ie. for item in list:

You can use the in operator to determine whether an item is contained in a list (not in can also be used)

lst.append(item) #where lst is a list

append(item): used to add items to a list - item is appended to the end of the existing list

del list[i]

del statement: removes an element from a specific index in a list

list1 = [1, 2, 3, 4] list2 = [item for item in list1]

how to copy a list

lst.index(item) #where lst is a list

index(item): used to determine where an item is located in a list

lst.insert(index, item) #where lst is a list

insert(index, item): used to insert item at position index in the list

size = len(my_list)

len function: returns the length of a list as an integer

list(str) #where str is a string

list() function can convert certain types of objects to lists

max(lst) or min(lst) #where lst is a list

min and max functions: built-in functions that returns the item that has the lowest or highest value in a sequence

print(lst) #where lst is a list

print function can be used to display an entire list

lst.remove(item) #where lst is a list

remove(item): removes the first occurrence of item in the list

lst.reverse() #where lst is a list

reverse(): reverses the order of the elements in the list

lst.sort() #where lst is a list

sort(): used to sort the elements of the list in ascending order

list[1] = new_value

• list[1] = new_value can be used to assign a new value to a list element