Prerit

“I wish I found Dataquest earlier. The guided projects gave me a challenge and the confidence to know I could do this on my own. The companies I interviewed with were very impressed by my portfolio.”

Prerit Anwekar

Senior Data Scientist

Path overview

In this path, you’ll learn the fundamentals of Python, as well as how to prepare and extract data by querying databases with SQL, how to create insightful data visualization, and how to perform descriptive and predictive statistical analysis.

Best of all, you’ll learn by doing — you’ll write code and get feedback directly in the browser. You’ll apply your skills to several guided projects involving realistic business scenarios to build your portfolio and prepare for your next interview.

Key skills

  • Programming with Python to perform complex statistical analysis of large datasets
  • Performing SQL queries and web-scraping to explore and extract data from databases and websites
  • Performing efficient data analysis from start to finish
  • Building insightful data visualizations to tell stories

Path outline

Part 1: Introduction to Python [4 courses]

Introduction to Python Programming 3h

Objectives
  • Write computer programs using Python
  • Save values using variables
  • Process numerical data and text data
  • Create lists using Python

Basic Operators and Data Structures in Python 5h

Objectives
  • Use for loops to repeat processes and conduct data analysis
  • Implement if, else, and elif statements in programming logic
  • Employ logical and comparison operators in Python
  • Develop and update Python dictionaries for data manipulation
  • Construct frequency tables using dictionaries for data analytics

Python Functions and Jupyter Notebook 5h

Objectives
  • Write Python functions
  • Debug functions
  • Define function arguments
  • Write functions that return multiple variables
  • Employ Jupyter notebook
  • Build a portfolio project

Intermediate Python for Data Science 8h

Objectives
  • Clean and analyze text data
  • Define object-oriented programming in Python
  • Process dates and times

Part 2: Intermediate Python and Pandas [3 courses]

Introduction to Pandas and NumPy for Data Analysis 13h

Objectives
  • Improve your workflow using vectorized operations
  • Select data by value using Boolean indexing
  • Analyze data using pandas and NumPy

Introduction to Data Visualization in Python 8h

Objectives
  • Visualize time series data with line plots
  • Define correlations and visualize them with scatter plots
  • Visualize frequency distributions with bar plots and histograms
  • Improve your exploratory data visualization workflow using pandas
  • Visualize multiple variables using Seaborn's relational plots

Telling Stories Using Data Visualization and Information Design 5h

Objectives
  • Create graphs using information design principles
  • Create narrative data visualizations using Matplotlib
  • Create visual patterns using Gestalt principles
  • Control attention using pre-attentive attributes
  • Employ Matplotlib's built-in styles

Part 3: Data Cleaning in Python [3 courses]

Data Cleaning and Analysis in Python 11h

Objectives
  • Employ data aggregation techniques
  • Combine datasets
  • Transform and reshape data
  • Clean strings and resolve missing data

Advanced Data Cleaning in Python 9h

Objectives
  • Clean and manipulate text data using regular expressions
  • Employ lambda functions and list comprehension with pandas
  • Resolve missing data

Data Cleaning Project Walkthrough 7h

Objectives
  • Complete a data cleaning project from start to finish
  • Improve your data cleaning skills

Part 4: The Command Line [2 courses]

Command Line for Data Science 4h

Objectives
  • Employ the command line for data science
  • Define important command line concepts
  • Modify the behavior of commands with options
  • Navigate the filesystem
  • Employ glob patterns and wildcards
  • Manage users and permissions

Text Processing for Data Science 4h

Objectives
  • Read and explore documentation
  • Inspect files
  • Perform basic text processing
  • Define different kinds of output
  • Redirect and pipe output
  • Employ streams and file descriptors

Part 5: Working with Data Sources Using SQL [6 courses]

Introduction to SQL and Databases 5h

Objectives
  • Define the structure of SQL
  • Create basic queries to extract data from tables in a database
  • Define databases
  • Identify different versions of SQL
  • Write good SQL code

Summarizing Data in SQL 3h

Objectives
  • Employ SQL to compute statistics
  • Provide statistics by group
  • Filter results over groups

Combining Tables in SQL Course 3h

Objectives
  • Combine tables using inner joins
  • Employ different types of joins
  • Employ other SQL clauses with joins
  • Join on complex conditions
  • Employ set operators like UNION and EXCEPT

Querying Databases with SQL and Python 1h

Objectives
  • Connect to a SQLite database using Python
  • Query a SQLite database using Python
  • Convert data from a SQLite database to a Pandas dataframe

SQL Subqueries 6h

Objectives
  • Nest a query inside another query
  • Employ different types of subqueries
  • Employ common table expressions
  • Scale your project with complex queries

Window Functions in SQL 5h

Objectives
  • Set up a frame for window functions
  • Compute running aggregations with aggregate window functions
  • Explore rank window functions
  • Apply distribution window functions
  • Use offset window functions

Part 6: APIs and Web Scraping in Python [2 courses]

APIs and Web Scraping in Python for Data Science 12h

Objectives
  • Understand the basics of APIs, the requests library, and JSON data handling in Python
  • Master API authentication, manage API keys, and learn to handle rate limits
  • Use optional query parameters for refined data retrieval from APIs
  • Develop skills in extracting and analyzing data from web pages
  • Integrate API data with Pandas for in-depth data analysis and visualization

Data Analysis for Business in Python 6h

Objectives
  • Resolve fuzzy language
  • Identify the business context of data science
  • Communicate with a non-technical audience
  • Define metrics

Part 7: Probability and Statistics [5 courses]

Introduction to Statistics in Python 9h

Objectives
  • Sample data using simple random sampling, stratified sampling, and cluster sampling
  • Measure variables in statistics
  • Create frequency distribution tables

Intermediate Statistics in Python 8h

Objectives
  • Summarize a distribution using the mean, the weighted mean, the median, or the mode
  • Measure the variability of a distribution using the variance and the standard deviation
  • Compare values using z-scores

Introduction to Probability in Python 4h

Objectives
  • Estimate theoretical and empirical probabilities
  • Employ the fundamental rules of probability
  • Employ combinations and permutations

Introduction to Conditional Probability in Python 6h

Objectives
  • Assign probabilities based on conditions
  • Assign probabilities based on event independence
  • Assign probabilities based on prior knowledge
  • Create spam filters using multinomial Naive Bayes

Hypothesis Testing in Python 4h

Objectives
  • Perform a permutation test
  • Perform significance testing to understand an outcome's importance
  • Define regular and multi-category chi-squared tests

Part 8: Advanced Topics in Data Analysis [2 courses]

Intermediate Command Line for Data Science 3h

Objectives
  • Employ Jupyter console
  • Process data from the command line

Introduction to Git and Version Control 4h

Objectives
  • Organize your code using version control
  • Employ Git and GitHub to collaborate with others
  • Resolve conflicts in version control

The Dataquest guarantee

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.

Money

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.

Projects in this path

Project: Learn and Install Jupyter Notebook

For this project, you’ll take on the role of a Jupyter Notebook beginner. You’ll learn the essentials of running code, adding explanatory text, and installing Jupyter locally to prepare for real-world data projects.

Guided Project: Profitable App Profiles for the App Store and Google Play Markets

For this project, you’ll be a data analyst at a company that builds free, ad-supported Android and iOS apps. To drive revenue, you’ll analyze real app market data to find app profiles that attract the most users.

Guided Project: Exploring Hacker News Posts

For this project, we’ll be data analysts exploring Hacker News posts. We’ll use Python string manipulation, OOP, and date handling to analyze trends driving post popularity. Check out our Jupyter Notebook Guided Project if needed.

Guided Project: Exploring eBay Car Sales Data

For this project, we’ll assume the role of data analysts for a used car classifieds service to explore and clean a dataset of car listings from eBay Kleinanzeigen, a section of the German eBay website.

Guided Project: Finding Heavy Traffic Indicators on I-94

For this project, you’ll assume the role of a data analyst exploring a dataset on westbound traffic on the I-94 Interstate highway. You’ll apply exploratory data visualization techniques to determine indicators of heavy traffic.

Plus 12 more projects

Build your project portfolio with the Data Analyst in Python path.

Learning resources

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Aaron

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.”

Jessi

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

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!”

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