Dictionaries and Frequency Tables

Learn to build frequency tables using dictionaries.


  • Learn how to create dictionaries.
  • Learn how to update dictionary values.
  • Learn how to check for dictionary membership.
  • Learn how to count with dictionaries and build frequency tables.

Mission Outline

1. Storing Data
2. Dictionaries
3. Indexing
4. Alternative Way of Creating a Dictionary
5. Key-Value Pairs
6. Checking for Membership
7. Counting with Dictionaries
8. Finding the Unique Values
9. Proportions and Percentages
10. Looping over Dictionaries
11. Keeping the Dictionaries Separate
12. Frequency Tables for Numerical Columns
13. Filtering for the Intervals
14. Next Steps
15. Takeaways

Course Info:

Python for Data Science: Fundamentals


The average completion time for this course is 10-hours.

This course is free and includes 6 missions, 1 guided project, and 1 tutorial.  It is the 1st course in the Data Analyst in Python path and Data Scientist in Python path.


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