oceanprotocol-job-details 0.2.6

A Python package to get details from OceanProtocol jobs

A Python package to get details from OceanProtocol jobs

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Installation

pip install oceanprotocol-job-details

Usage

As a simple library, we only need to import JobDetails and load it, it will:

1. Fetch the needed parameters to populate the JobDetails instance from the environment variables or use the passed values to the load() method.
2. Look for the files corresponding to the passed DIDs in the filesystem according to the Ocean Protocol Structure and load them into the JobDetails instance.

Minimal Example

from oceanprotocol_job_details import JobDetails

job_details = JobDetails.load()

Custom Input Parameters

If our algorithm has custom input parameters and we want to load them into our algorithm, we can do it as follows:

from dataclasses import dataclass
from oceanprotocol_job_details import JobDetails


@dataclass
class InputParameters:
    foobar: str


job_details = JobDetails[InputParameters].load(InputParameters)

# Usage
job_details.input_parameters.foobar

from dataclasses import dataclass
from oceanprotocol_job_details import JobDetails


@dataclass
class Foo:
    bar: str


@dataclass
class InputParameters:
    # Allows for nested types
    foo: Foo


job_details = JobDetails[InputParameters].load(InputParameters)

# Usage
job_details.input_parameters.foo.bar

The values to fill the custom InputParameters will be parsed from the algoCustomData.json located next to the input data directories.

Iterating Input Files the clean way

from oceanprotocol_job_details import JobDetails


job_details = JobDetails.load()

for idx, file_path in job_details.next_file():
    ...

# Or if you just want one file path
_, file_path = job_details.next_file()

OceanProtocol Structure

data        # Root /data directory
├── ddos    # Contains the loaded dataset's DDO
│   ├── 17feb...e42 # DDO file
│   └── ... # One DDO per loaded dataset
├── inputs  # Datasets dir
│   ├── 17feb...e42 # Dir holding the data of its name DID, contains files named 0..X
│   │   └── 0 # Data file
│   └── algoCustomData.json # Custom algorithm input data
├── logs    # Algorithm output logs dir
└── outputs # Algorithm output files dir

Note: Even though it's possible that the algorithm is passed multiple datasets, right now the implementation only allows to use one dataset per algorithm execution, so normally the executing job will only have one ddo, one dir inside inputs, and one data file named 0.