Retries with Requests: Backoff, Session, and HTTPAdapter
Retry transient failures within bounds without duplicating operations or causing a request storm.
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12 articles on this pageQueueHandler and QueueListener for Python Logging
Send LogRecord objects to a queue and process slow handlers on a dedicated thread.
asyncio Streams: Reader, Writer, and TCP
Read and write asynchronous TCP protocols with high-level APIs and explicit bounds.
asyncio.Lock and Event: Synchronize Coroutines
Protect shared state between tasks and notify waiters when a condition becomes ready.
Python ParamSpec: Type-Safe Decorators
Forward a complete callable signature through a higher-order function.
typing.Literal in Python: Restrict Values
Express that an input accepts specific values rather than every string or integer.
Pydantic Serialization with model_dump
Turn validated models into dictionaries or JSON under an explicit output contract.
Discriminated Unions in Pydantic with Literal
Validate alternative payload shapes through one field that unambiguously identifies each variant.
Error Handling in Flask APIs
Turn expected exceptions into consistent responses while keeping unexpected failures observable.
Django Migrations: makemigrations and migrate
Version schema evolution with models and apply the same sequence in every environment.
SQLAlchemy Cascades: delete-orphan and ON DELETE
Express ownership of related-object lifecycles and decide which layer performs deletion.
SQLAlchemy Pagination with limit, offset, and Cursors
Return predictable pages without repeating or skipping rows.