“The learning paths on Dataquest are incredible. They give you a direction through the learning process – you don’t have to guess what to learn next.”

Otávio Silveira

Data Analyst @ Hortifruti

Course overview

In this course, you’ll explore the world of Python for development. You’ll learn basic Python concepts such as dictionaries, APIs, functions, and default arguments. 

Best of all, you’ll learn by doing — you’ll practice and get feedback directly in the browser. The course will conclude with a guided project where you will create a food ordering app!

Key skills

  • Create and update dictionaries
  • Use an API to get information from the web
  • Create your own functions

Course outline

Python Dictionaries, APIs, and Functions [5 lessons]

Dictionaries 2h

Lesson Objectives
  • Create dictionaries
  • Update dictionary values
  • Check for dictionary membership
  • Count with dictionaries
  • Add and remove items from dictionaries
  • Understand JSON data as it relates to dictionaries

APIs and the Requests Library 2h

Lesson Objectives
  • Define what an API is
  • Import the requests library
  • Differentiate between GET and POST calls
  • Explain what JSON data is
  • Execute a basic endpoint call using requests

Functions: Fundamentals 2h

Lesson Objectives
  • Define a function
  • Create functions
  • Create function pipelines
  • Debug functions

Functions: Intermediate 2h

Lesson Objectives
  • Define default arguments
  • Utilize multiple return statements
  • Return multiple variables
  • Identify mutable and immutable data types
  • Reference documentation
  • Identify global and local variable scopes

Guided Project: Build a Food Ordering App 2h

Lesson Objectives
  • Use dictionaries
  • Modify dictionary values
  • Add or remove dictionary keys
  • Create custom functions
  • Define global-level variables

Projects in this course

Guided Project: Build a Food Ordering App

For this project, you’ll become a restaurant owner building a Python food ordering app. You’ll use dictionaries, loops, and functions to create an interactive system for viewing menus, modifying carts, and placing orders.

The Dataquest guarantee


Dataquest has helped thousands of people start new careers in data. If you put in the work and follow our path, you’ll master data skills and grow your career.


We believe so strongly in our paths that we offer a full satisfaction guarantee. If you complete a career path on Dataquest and aren’t satisfied with your outcome, we’ll give you a refund.

Master skills faster with Dataquest

Go from zero to job-ready

Go from zero to job-ready

Learn exactly what you need to achieve your goal. Don’t waste time on unrelated lessons.

Build your project portfolio

Build your project portfolio

Build confidence with our in-depth projects, and show off your data skills.

Challenge yourself with exercises

Challenge yourself with exercises

Work with real data from day one with interactive lessons and hands-on exercises.

Showcase your path certification

Showcase your path certification

Impress employers by completing a capstone project and certifying it with an expert review.

Grow your career with

of learners recommend
Dataquest for career advancement
Dataquest rating
SwitchUp Best Bootcamps
Average salary boost
for learners who complete a path

Aaron Melton

Business Analyst at Aditi Consulting

“Dataquest starts at the most basic level, so a beginner can understand the concepts. I tried learning to code before, using Codecademy and Coursera. I struggled because I had no background in coding, and I was spending a lot of time Googling. Dataquest helped me actually learn.”


Jessica Ko

Machine Learning Engineer at Twitter

“I liked the interactive environment on Dataquest. The material was clear and well organized. I spent more time practicing then watching videos and it made me want to keep learning.”


Victoria E. Guzik

Associate Data Scientist at Callisto Media

“I really love learning on Dataquest. I looked into a couple of other options and I found that they were much too handhold-y and fill in the blank relative to Dataquest’s method. The projects on Dataquest were key to getting my job. I doubled my income!”

Join 1M+ data learners on


Create a free account


Choose a learning path


Complete exercises and projects


Advance your career

Start learning today