Write type-safe Python code

Write Python 3.11+ code with type hints, async, and testing

When building production Python with strict typing, 80%+ test coverage, and async I/O optimization.

• · Python code requirements, library choices, test scope

• · Type-hinted Python code
• · pytest tests
• · async patterns
• · performance optimization

• · pytest

• · Application running or mock server configured
• · Valid test framework setup

• · Flaky tests due to timing
• · Brittle selectors breaking on CSS changes
• · Test pollution from shared state

• · Test passes 10x without flakes
• · Coverage > 80%
• · Ran through CI/CD