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This is simple `.pyi` stubs generator from thrift interfaces

Project description

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This is simple .pyi stubs generator from thrift interfaces. Motivation for this project is to have autocomplete and type checking for dynamically loaded thrift interfaces

Installation

pip install thrift-pyi

Quickstart

Sample usage:

$ thriftpyi example/interfaces --output example/app/interfaces

Additionally to generated stubs you might want to create __init__.py that will load thrift interfaces, for example:

from pathlib import Path
from types import ModuleType
from typing import Dict

import thriftpy2

_interfaces_path = Path("example/interfaces")
_interfaces: Dict[str, ModuleType] = {}


def __getattr__(name):
    try:
        return _interfaces[name]
    except KeyError:
        interface = thriftpy2.load(str(_interfaces_path.joinpath(f"{name}.thrift")))
        _interfaces[name] = interface
        return interface

To see more detailed example of usage refer to example app

–strict-optional

Python and thrift are very different at argument handling. For example in thrift the following will be correct declaration:

struct TodoItem {
    1: required i32 id
    3: optional i32 type = 1
    2: required string text
}

In python, fields without default values cannot appear after fields with default values. Therefore by default all fields are optional with default to None. This is compliant to thriftpy2.

However, if you want more strict behaviour you can specify –strict-optional option. For the case above, the following stubs will be generated:

from dataclasses import dataclass

@dataclass
class TodoItem:
    id: int
    type: int = 1
    text: str

Development

To install pre-commit hooks:

pre-commit install

To run the all tests run:

tox

Project details


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