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049-snack-and-lift/docs/wiki/Step-4.md

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**English** · [Dansk](Step-4-da) · [Bahasa Melayu](Step-4-ms)
# Step 4: Check if a class is already booked
## What you gain
You learn to read the state of a button before acting: "Book Class", "Join Waitlist", "Booked" or "Waitlisted". A class that is already booked is not clicked again, and the bot prints a ✓ line that says what it did.
## Where it is in the code
`src/snack_and_lift/domain/rules.py`
## Screenshot
![Step 4: Check if a class is already booked](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/049-snack-and-lift/raw/branch/main/docs/images/step-4.png)
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