11 micro-topics in Programming Languages, each with the evidence that proves you have it and the written reason behind every link. Before you start, it rests on 4 other domains. Downstream, it holds up 7 domains.
11 topics · depth 1–7 of 16 · 9 internal links · 8 in · 10 out
Load-bearing links first. Each one says what in this domain rests on what outside it, and why.
4 links
Add type hints rests on Define functions
Hints annotate signatures.
Use the typing module rests on Work with dictionaries and sets
TypedDict describes dictionary shapes.
Write async Python rests on Define functions
Async functions are functions.
Call HTTP APIs asynchronously rests on Serialize and deserialize JSON
API responses are decoded as JSON.
2 links
Manage virtual environments rests on Manage Python packages
Environments isolate the installs you can already perform.
Structure a Python project rests on Read a dependency manifest
Project metadata lives in the manifest.
1 link
Write async Python rests on Write async and await
The await model transfers between languages.
1 link
Add type hints rests on Annotate types
Type annotation transfers across languages.
In prerequisite order. Each idea names the artifact that closes it, the market demand that put it on the map, and what it stands on.
Depth 1 · procedural · unassisted · M15 §15.1
Isolates dependencies per project
Manage Python packages · Package Managers
Environments isolate the installs you can already perform.
Depth 2 · representational · unassisted · M15 §15.1
Lays out packages, modules and pyproject.toml
Layout assumes an isolated environment to run in.
Read a dependency manifest · Package Managers
Project metadata lives in the manifest.
Depth 3 · procedural · unassisted · M15 §15.1
Runs formatters and linters in the loop
Tooling is configured at the project level.
Depth 5 · language · unassisted · M15 §15.2
Annotates signatures and collections
Define functions · Python Core
Hints annotate signatures.
Annotate types · TypeScript Types
Type annotation transfers across languages.
Depth 5 · conceptual · unassisted · M15 §15.4
Applies async and await for I/O-bound work
Define functions · Python Core
Async functions are functions.
Write async and await · JavaScript Core
The await model transfers between languages.
Depth 6 · conceptual · scaffolded · M15 §15.2
Applies Optional, Union, Protocol and TypedDict
The typing module extends basic annotations.
Work with dictionaries and sets · Python Core
TypedDict describes dictionary shapes.
Depth 6 · procedural · scaffolded · M15 §15.4
Uses asyncio.gather for parallel work
Gathering runs coroutines you can already write.
Depth 6 · procedural · unassisted · M15 §15.4
Uses an async client with timeouts
An async client is awaited.
Serialize and deserialize JSON · Python Core
API responses are decoded as JSON.
Depth 6 · conceptual · scaffolded · M15 §15.4
Yields values as they arrive
Async iteration extends async functions.
Depth 7 · meta · scaffolded · M15 §15.2
Runs a type checker as a gate
A checker verifies the annotations you wrote.
Type checking joins the same pre-merge gate.
Depth 7 · conceptual · scaffolded · M15 §15.4
Retries with jitter and a ceiling
Retries wrap the calls you are making.
Everything downstream that names an idea here as a prerequisite, grouped by where it lives.
3 links
Apply a circuit breaker to model calls rests on Apply rate limiting and backoff
A breaker is the escalation of a retry policy.
Choose sync or async calls rests on Write async Python
The async path requires async Python.
Configure a model client rests on Call HTTP APIs asynchronously
Provider clients are HTTP clients with a wrapper.
2 links
Test async code rests on Write async Python
You test async code.
Mock external APIs rests on Call HTTP APIs asynchronously
You mock the client you use.
1 link
Route requests in FastAPI rests on Write async Python
Handlers are async functions.
1 link
Ingest from files and APIs rests on Call HTTP APIs asynchronously
Ingestion pulls from APIs.
1 link
Stream from an async iterator rests on Produce async iterators
Streaming yields from an async iterator.
1 link
Define schemas with Pydantic rests on Add type hints
Fields are declared with type annotations.
1 link
Generate embeddings at scale rests on Run async calls concurrently
Embedding a corpus is a batch of concurrent calls.
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