Learn Python as a Frontend Engineer -Unlock Backend, AI, and Automation

Confusion between global Python packages and virtual environments (similar to installing npm packages globally vs locally).

Always ensure your terminal prompt shows '(venv)' before running 'pip install'. Make it a habit to create a venv immediately in new projects.

Accidentally blocking the event loop in FastAPI by using 'def' instead of 'async def' for I/O bound operations.

Read the FastAPI documentation section on 'Concurrency and async / await'. Rule of thumb: if a library supports await, use 'async def'.

Assuming Python's type hints enforce types at runtime like a compiled language.

Remember that Python type hints are for developer tooling (mypy, IDEs) and don't stop runtime execution, except when using validation libraries like Pydantic.