🕹️ Practice arcade

➗ Operator Sprint

Floor division with negatives, / against //, int() against round(), float sums and precedence. Two minutes, as many as you can.

🔤 Strings Sprint

Slices that stop early, replace and find, split with empty fields, f-string formats. Two minutes of text.

🐛 Bug-Hunt Time Trial

Two minutes. Each function has one bad line: a range one short, count = 1, sort() that returns None, a missing dict key. Find it.

🧮 Sort and Comprehend

Stable sorts with a key, capitals before lowercase, zip that stops early, and comprehensions with a filter. Two minutes.

🌐 Status Code Sprint

200, 301, 404, 503: read the first digit and say whose problem it is. Sixty seconds.

⚖️ Truthy or Falsy

bool("False"), what `or` really returns, and which branch of an if/elif chain wins. Three misses and you're out.

💥 Code Review Survival

A bare except, a method without self, a reused generator, a decorator that returns the wrong thing. Three misses and you're out.

🗃️ Collections Survival

append against extend, remove by value, starred unpacking, dict keys, set operators, and which collection fits the job. Three misses and you're out.

🔗 Names and References

b = a, .copy(), shallow copies of nested lists, mutable defaults, locals that hide globals. Three misses and you're out.

🔁 Loop Tracer

range that stops before its stop, while loops that overshoot, break, continue, loop else, nested loops and match. Five right in a row.

📞 Calls and Returns

print against return, what a bare call shows in a script, and recursion on the way down and back up. Five in a row.

🧯 Exceptions Mastery

Which exception a line raises, and the order try, except, else and finally print in. Five in a row.

🧱 Objects Mastery

Shared class attributes, __str__ against __repr__, == without __eq__, and where super().__init__ runs. Five right in a row.

🌀 Lazy and Late

Generators that run only when asked and can't be reused, and closures that look a variable up late. Five in a row.