atdpy

Atdpy

Atdpy takes type definitions in the ATD format and derives Python classes that can read and write JSON data. This saves the developer the labor writing boilerplate that converts between dicts and classes.

This allows safe interoperability with other languages supported by ATD such as OCaml, Java, or Scala.

See the sample input type definitions everything.atd and the Python output everything.py.

Requirements

Requirements for building and testing atdpy:

• Opam and dependencies installed from the atd project root with make setup.
• Python 3 (>= 3.7), mypy, pytest

Requirements for generating Python code:

• the atdpy executable

Requirements for running the generated Python code:

• Python >= 3.7
• the generated code (no need for a runtime library at this time)

Documentation

• Main documentation for atdpy
• Command-line documentation: atdpy --help

Development notes

Build or rebuild with make. Test with make test. This requires pytest which can be installed with

pip install pytest mypy

Running the tests is done from the atdpy/ main folder with make test.

We have two kinds of tests for atdpy:

• unit tests for testing internal OCaml code
• code generation and Python tests:
  • they generate Python code from ATD files and compare the Python output against the expectations. Updating the expected output files is done with dune promote (similar to pytest --snapshot-update).
  • the generated code is executed by some tests using pytest.

Contributing

Help is welcome and there are various ways to help:

• Add examples to the documentation
• File a GitHub issue to report a problem
• Pick an issue that has the target:python label and implement a solution