#python dictionaries

Python dictionaries Quiz 2022 -50 Questions

Indexing Python dictionaries with tuples

In Python it is possible to index dictionaries with tuples. I made use of this technique in one of my previous posts, covering constraint programming with Google OR-tools in Python. I demonstrate the technique in the coding example below: # declare empty dictionary dictObj = {} # adding elements, indexed (keyed) with a tuple for i in range(3): for j in range(3): dictObj[(i,j)] = i + j # print…

This small program was quite a challenge to figure out as it took me over at least an hour and a half to two hours to figure it out. As I was reading over dictionaries, I decided to create one on my own that will include a function. As you can see, I like functions… Dictionaries in my opinion, is similar to list except that this time you have keys and values.  A great example of this is: {‘color’: ‘red’, ‘name’: ‘Tammy’, ‘place’: ‘Memphis’}

In this small program, the following is done:

Create a list with keys and values. I create a list of items that I have.

Sum the total of the values 

Print out overall total and the key and value.

Below is my code:

myfav_items = {'dresses': 15, 'shoes': 26, 'purses': 12, 'hats': 5, 'earrings': 10}

def displayInventory(inventory):    total = 0    for k, v in inventory.items():        print k, v        total = total + inventory[k]    print("Total number of items: " + str(total))

displayInventory(myfav_items) My results came out to be: 

earrings 10 hats 5 shoes 26 dresses 15 purses 12 Total number of items: 68

*It is not the prettiest in formatting but just wanted to show how with the code abobe, each item and value can be displayed as well as the total. 

Lesson Learned