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All courses/Python BasicsDemo: Summarize Library Visits
Dictionaries and Sets
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○Look Up and Update a Dictionary○Exercise: Update a Contact○Loop Through Dictionary Entries○Exercise: Write a Receipt○Keep Unique Visitors in a Set○Exercise: Compare Club Groups●Demo: Summarize Library Visits○Exercise: Build a Market Roster✦Module Quiz
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Demo: Summarize Library Visits

The library logs visits as a list of dictionaries. Each record has a name and room; duplicate names represent repeat visits. Read fields by key in a loop, use counts.get(room, 0) + 1 to count visits, and use set(names) for distinct people. This integrates the earlier dictionary and set lessons in a runnable project.

This is an editable worked demo. Edit main.py, press Run to compare the result, then Submit to check your small change. The next lesson transfers the idea to a different setting.

Change the final people value to count unique names instead of all visits. Run should print 2 visitors; then Submit.

Your Task

  1. Set people to the count of distinct names in names.
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Press Run to execute your code.