Vlsarro / eoppo

The Python micro library for building embeddable object operators as wrapper classes

Embeddable Object Processing Python Operator (EOPPO)

EOPPO is a lightweight library for constructing wrapper classes that do some operations on objects passed to them and pass them further. It is designed to provide a public interface for such classes with embedded exception handling and optional dependency check. It also provides an ability to combine your processing modules into a single pipeline.

Another feature to keep in mind is that each operator could be considered as a distinct module with it's own version and name. Operators are expected to be used for integration into other systems, but you are free to use them standalone.

Installing

Install with pip:

pip install git+https://[e-mail]/Vlsarro/eoppo.git

A Simple Example

Following operator calculates the sum of integers and multiplies them by provided factor

from typing import Callable, List

from eoppo.core.base import BaseObjectProcessingOperator
from eoppo.exceptions import ObjectProcessingError


class SumMultiplyOperator(BaseObjectProcessingOperator):

    def _process(self, ob: List[int], callback: Callable[..., None] = None, m_factor=1, **kwargs) -> int:
        if callback:
            callback(data=len(ob))
        return sum(ob) * m_factor


if __name__ == '__main__':
    op = SumMultiplyOperator()
    try:
        result = op.process([1, 2, 3, 4], m_factor=2, callback=lambda **kw: print(kw))
    except ObjectProcessingError:
        result = 0

For more practical examples you can take a look at /examples folder. At first this library was related solely to image processing, so examples are also associated with this area.