Retry on failure
Write a Python program that retries an unreliable operation up to 3 times. Step-by-step explanation, colour-coded code and real output.
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1,137 articles · page 12 of 95 · Clear filtersHandle a missing file
Write a Python program that opens a file and handles the case where it does not exist. Step-by-step explanation, colour-coded code and real output.
Chain exceptions with raise from
Write a Python program that converts a low-level error into a clearer one and keeps the cause. Step-by-step explanation, colour-coded code and real output.
Log and re-raise
Write a Python program that logs an error and then re-raises it to the caller. Step-by-step explanation, colour-coded code and real output.
Custom exception class
Write a Python program with a custom `InsufficientBalanceError`. Step-by-step explanation, colour-coded code and real output.
Raise an exception
Write a Python function that raises ValueError for an invalid age. Step-by-step explanation, colour-coded code and real output.
Use the finally block
Write a Python program that shows `finally` always runs. Step-by-step explanation, colour-coded code and real output.
Use the else block
Write a Python program that uses `else` to run code only when no exception occurred. Step-by-step explanation, colour-coded code and real output.
Catch several errors in one block
Write a Python program that catches ValueError and TypeError in one except block. Step-by-step explanation, colour-coded code and real output.
Several except blocks
Write a Python function that handles TypeError and ZeroDivisionError separately. Step-by-step explanation, colour-coded code and real output.
Handle an index out of range
Write a Python program that reads a list item by index and handles invalid indexes. Step-by-step explanation, colour-coded code and real output.
Handle invalid integer input
Write a Python program that converts text to an integer and reports invalid values. Step-by-step explanation, colour-coded code and real output.
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