medium Error Handling

Custom Exception for Bookings

The Brief

A booking system needs a custom exception class for situations where a customer tries to book outside operating hours. Build a `BookingError` class extending Exception, with a custom message and a `time` attribute. Then build a `validate_booking_time(hour)` function that raises it when given a time outside 9-17. Demonstrate by attempting two bookings: one valid and one invalid, and printing the result of each.

Acceptance Criteria

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8 When BookingError is caught, print both the error message AND the time attribute

2 The __init__ method takes a message and a time and stores both as instance attributes

5 If valid, the function prints a confirmation message

1 Define a class called BookingError that inherits from Exception

3 Call super().__init__(message) so the Exception base class works correctly

6 Demonstrate calling the function with a valid hour (e.g. 10) inside a try/except

7 Demonstrate calling the function with an invalid hour (e.g. 22) inside a try/except

4 Define a function validate_booking_time(hour) that raises BookingError if hour is below 9 or 17 and above

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solution.py

Python 3

# Build a BookingError class and a validation function

# class BookingError(...):
#     ...

# def validate_booking_time(hour):
#     ...

# Demonstrate one valid and one invalid booking

Console