frid 0.5.2

Flexibly Represented Interactive Data

FRID: Flexibly Represented Interactive Data

This Python package is a tool for data manipulation.

Supported data types include:

• All JSON types: string, integer, floating point, boolean, null, array (as Python lists), and object (as Python dictionaries).
• Additional data types: binary types (bytes/bytearray/memoryview) and date types (date/time/datetime).
• Base classes are provided for user-extensible data structures, allowing users to convert between any customized data structures and string representations.

Current key features include:

• A data serialization/deserialization tool:
  • Data can be dumped into and loaded from a string representation that is more concise than the JSON format.
  • The library is capable of encoding data in fully JSON- or JSON5-compatible formats, including escape sequences in strings to support additional data types.
• A number of utilities functions and classes, including some asyncio utilities.
• A key/value store supporting memory, file system, redis, and sqlalchemy as backends.
• Web application support tools, such as:
  • Converting data from HTTP request bodies based on content type.
  • Converting data types to HTTP requests and setting the correct headers.
  • Sending streaming responses if the data of the body comes from an asynchronous iterator.
  • A mimimal web server routing framework, supporting both WSGi and ASGi.
  • Websocket support for ASGi.

Dependencies:

The package do not have required dependencies, but it needs a few optional dependencies to run some features:

• redis: for Redis support; also a system command redis-server to run unit tests.
• sqlalchemy: for SQL support, with some additional packages depending on backend; to run async key/value store with Sqlite, one need aiosqlite and greenlet to run the unit tests. For Postgres, the following are needed:
  • psycopg[binary] for sync Postgres support,
  • asyncpg for async Postgres support.
• For web servers:
  • gunicorn to run WSGi unit tests.
  • uvicorn to run ASGi unit tests.
• For websocket support (ASGi only):
  • websockets with uvicorn (or install uvicorn[standard]); it also allows us to run websockets' threading-based sync client for unit tests.
  • websocket-client to run websocket-client-based unit tests.

Other possibilities that haven't been tested:

• For ASGi: daphne and hypercorn;
• For ASGi with uvicorn: wsproto is an alternative to websockets.