✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

🤑 Join the Treehouse affiliate program and earn 25% recurring commission!

New No-Code Track! 🚀start learning today!

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

🤑 Join the Treehouse affiliate program and earn 25% recurring commission!

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
    • College Credit
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
  • Resources
    Chevron
    • Career Toolbox
    • CodeForward
    • Free Treehouse Near Me
    • Jobs
    • Blog
    • Support
    • About
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks College Credit
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Career Toolbox CodeForward Free Treehouse Near Me Jobs Blog Support About
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • Android
      • • APIs
      • • Coding for Kids
      • • College Credit
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Game Development
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • No-Code
      • • PHP
      • • Professional Growth
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
      • • Swift
    • Showing results for:
    • Data Analysis
    • Cleaning and Preparing Data
    • Close
  • Cody Stephenson
    Cody Stephenson
    8,361 Points

    Are these valid solutions for the individual practice tasks?

    Posted on Jun 18, 2021 by Cody Stephenson
    Cody Stephenson
    8,361 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Infeasible and Extreme Data

    0 Answers

  • Cody Stephenson
    Cody Stephenson
    8,361 Points

    Here are my function-based attempts to trim whitespace and get other information.

    Posted on Jun 14, 2021 by Cody Stephenson
    Cody Stephenson
    8,361 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Simple Data Issues

    0 Answers

  • Martin Daykin
    Martin Daykin
    7,548 Points

    How do you open the files in the teachers' notes in a jupyter notebook?

    Posted on Nov 24, 2020 by Martin Daykin
    Martin Daykin
    7,548 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • “Clean” and “Dirty” Data
    • Exploring Your Dataset

    1 Answer

  • Jaron Trotter
    Jaron Trotter
    11,472 Points

    Can't read CSV files after I navigate to where my downloaded files are and I import pandas.

    Posted on Nov 4, 2020 by Jaron Trotter
    Jaron Trotter
    11,472 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • “Clean” and “Dirty” Data
    • Exploring Your Dataset

    1 Answer

  • Gaurav Sharma
    Gaurav Sharma
    5,496 Points

    Find all of the columns in the demographics file that contain string data.

    Posted on Jul 23, 2020 by Gaurav Sharma
    Gaurav Sharma
    5,496 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Simple Data Issues

    1 Answer

  • Joe Li
    Joe Li
    3,234 Points

    Can't read in CSV files after importing the pandas library

    Posted on Jun 8, 2020 by Joe Li
    Joe Li
    3,234 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • “Clean” and “Dirty” Data
    • Exploring Your Dataset

    1 Answer

  • ian mays
    ian mays
    5,214 Points

    SWAPI.CO is now https://swapi.dev/

    Posted on May 4, 2020 by ian mays
    ian mays
    5,214 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • “Clean” and “Dirty” Data
    • What is Data Cleaning?

    0 Answers

  • alexkalt
    alexkalt
    15,319 Points

    Exercise from Stage 2 Video 5

    Posted on Apr 19, 2020 by alexkalt
    alexkalt
    15,319 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Duplicated Data

    0 Answers

  • Elcin Karababa
    Elcin Karababa
    2,858 Points

    how do i load the data and extra libraries into python?

    Posted on Oct 13, 2019 by Elcin Karababa
    Elcin Karababa
    2,858 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • “Clean” and “Dirty” Data
    • Exploring Your Dataset

    1 Answer

  • Jason Tran
    Jason Tran
    7,393 Points

    Clean demo data

    Posted on Jul 29, 2019 by Jason Tran
    Jason Tran
    7,393 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Selecting Relevant Data
    • Choosing the Right Features

    1 Answer

  • Jason Tran
    Jason Tran
    7,393 Points

    Find the column with the highest percentage of missing information in demographics

    Posted on Jul 29, 2019 by Jason Tran
    Jason Tran
    7,393 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Missing Data

    1 Answer

  • pegamoose
    pegamoose
    16,046 Points

    Why can we assume rows are only duplicated once?

    Posted on Jul 26, 2019 by pegamoose
    pegamoose
    16,046 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Duplicated Data

    1 Answer

  • Tatiane Lima
    Tatiane Lima
    6,738 Points

    There is a link with a 404 error in the teacher notes

    Posted on Apr 7, 2019 by Tatiane Lima
    Tatiane Lima
    6,738 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Selecting Relevant Data
    • Automated Feature Selection

    1 Answer

  • Tatiane Lima
    Tatiane Lima
    6,738 Points

    In the file of this class the dtaype of 'DMDEDUC3' is "object"

    Posted on Apr 7, 2019 by Tatiane Lima
    Tatiane Lima
    6,738 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Selecting Relevant Data
    • Choosing the Right Features

    0 Answers

  • frankgenova
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    frankgenova
    Python Web Development Techdegree Student 15,616 Points

    How much data is missing from each row - what does axis = 1 mean?

    Posted on Feb 18, 2019 by frankgenova
    .a{fill-rule:evenodd;}techdegree
    frankgenova
    Python Web Development Techdegree Student 15,616 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Missing Data

    1 Answer

  • Mark Chesney
    Mark Chesney
    11,747 Points

    Fixing or Excluding Data: quiz question -- best option for removing all missing data from the dataset

    Posted on Feb 16, 2019 by Mark Chesney
    Mark Chesney
    11,747 Points
    • Data Analysis
    • Cleaning and Preparing Data
    • Handling Bad Data
    • Fixing or Excluding Data

    1 Answer

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.

    Treehouse

  • About
  • Blog
  • Careers
  • Community
  • Stories
  • Shop
  • Contact
  • Gift Card

See Full Catalogue

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
  • Python Development
  • Data Analysis
  • UX Design

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
  • ...see more

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
  • ...see more

Explore

  • Plans
  • Affiliates
  • Perks
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
Terms & Conditions | Privacy

© 2025 Treehouse Island, Inc.