Fibonacci generator
Write a generator that yields Fibonacci numbers, and take the first 10. Step-by-step explanation, colour-coded code and real output.
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1,137 articles · page 11 of 95 · Clear filtersEven numbers generator
Write a generator that yields even numbers up to a limit. Step-by-step explanation, colour-coded code and real output.
Countdown generator
Write a generator that counts down from n to 1. Step-by-step explanation, colour-coded code and real output.
A for loop by hand
Write a Python program that rebuilds a `for` loop using `while`, `iter()` and `next()`. Step-by-step explanation, colour-coded code and real output.
Use iter() and next()
Write a Python program that walks through a list with `iter()` and `next()`. Step-by-step explanation, colour-coded code and real output.
Python Exception Handling Programs with Solutions
20 Python exception handling programs with solutions: try, except, else, finally, raise, custom exceptions, retries and safe parsing, each explained.
Exception hierarchy order
Write a Python program showing why specific exceptions must be caught before general ones. Step-by-step explanation, colour-coded code and real output.
Collect several errors
Write a Python program that validates several fields and reports every error at once. Step-by-step explanation, colour-coded code and real output.
Clean-up with a context manager
Write a Python program showing that a `with` block closes a file even when an error happens inside...
Print exception details
Write a Python program that prints the type, message and line of a caught exception. Step-by-step explanation, colour-coded code and real output.
Ask until the input is valid
Write a Python program that keeps asking for a number until a valid one is entered. Step-by-step explanation, colour-coded code and real output.
Use assert for checks
Write a Python program that uses `assert` to check a condition and handles the AssertionError. Step-by-step explanation, colour-coded code and real output.
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