Omnia Timeseries Python API

Python package for interacting with the Omnia Industrial IoT Timeseries API.

How do I get set up?

To use the Python package, install it in the following manner:

pip install git+https://github.com/equinor/omnia-timeseries-python.git@main

For support, create an issue on GitHub.

Example usage

For fundamental questions please refer to the MSAL documentation which has code examples for multiple programming languages and scenarios.

You should also familiarize yourself with the azure.identity package, which we will use below.

Follow usage examples to learn how to retrieve data in Json format.
Follow get data as protobuf example to learn how to retrieve data in Protobuf format.

Preparing Azure authentication

Read https://github.com/equinor/OmniaPlant/wiki/Authentication-&-Authorization to familiarize yourself with how Timeseries API handles authentication and authorization.

The TimeseriesAPI client accepts any azure.identity credential that inherits from MsalCredential, so you can pick the flow that suits your environment. The options we currently cover are:

• Service principal with client secret (ClientSecretCredential) for headless service-to-service scenarios.
• Service principal with certificate (ClientCertificateCredential) when you prefer cert-based authentication instead of a secret.
• Managed identities / default credential chain (ManagedIdentityCredential or DefaultAzureCredential) when running inside Azure.
• Interactive browser login (InteractiveBrowserCredential) for local development where you can complete the sign-in with a browser.
• User impersonation (DeviceCodeCredential or other interactive flows that acquire a user token) when you need to act on behalf of a signed-in user; this requires the Timeseries API app to consent to the user_impersonation scope.
• On-behalf-of flow (OnBehalfOfCredential) when a middle-tier service needs to exchange a signed-in user's token for a Timeseries API token and act with delegated permissions.

The supported credential setups are shown below.

With service principal credentials (client secret)

Read Service-to-service using a shared secret and ensure prerequisite steps have been done.

from azure.identity import ClientSecretCredential
import os
credentials = ClientSecretCredential(
    tenant_id=os.environ['AZURE_TENANT_ID'],
    client_id=os.environ['AZURE_CLIENT_ID'],
    client_secret=os.environ['AZURE_CLIENT_SECRET']
)

With service principal credentials (client certificate)

Use a certificate instead of a shared secret when you want a stronger identity proof and avoid storing plain secrets.

from azure.identity import ClientCertificateCredential
import os
credentials = ClientCertificateCredential(
    tenant_id=os.environ['AZURE_TENANT_ID'],
    client_id=os.environ['AZURE_CLIENT_ID'],
    certificate_path=os.environ['AZURE_CLIENT_CERT_PATH']
)

With interactive browser login

When developing locally, you can open a browser window and sign in manually.

from azure.identity import InteractiveBrowserCredential
import os
credentials = InteractiveBrowserCredential(
    tenant_id=os.environ['AZURE_TENANT_ID'],
    client_id=os.environ['AZURE_CLIENT_ID']
)

With user impersonation (device code)

Use a device code or other interactive credential that requests the user_impersonation scope so the signed-in user is impersonated by the Timeseries API.

from azure.identity import DeviceCodeCredential
import os
credentials = DeviceCodeCredential(
    tenant_id=os.environ['AZURE_TENANT_ID'],
    client_id=os.environ['AZURE_CLIENT_ID']
)

With managed / default credentials

Read Managed Service Identity (For Equinor applications in Azure) and ensure prerequisite steps have been done.

from azure.identity import DefaultAzureCredential
credentials = DefaultAzureCredential()

With on-behalf-of flow

Use OnBehalfOfCredential when a backend service receives a user token (the user assertion) and needs to call the Timeseries API on that user's behalf.

from azure.identity import OnBehalfOfCredential
import os
credentials = OnBehalfOfCredential(
    tenant_id=os.environ['AZURE_TENANT_ID'],
    client_id=os.environ['AZURE_CLIENT_ID'],
    client_secret=os.environ['AZURE_CLIENT_SECRET'],
    user_assertion=os.environ['USER_ASSERTION']
)

Output

The Json response from Timeseries API looks like this:

>> {'items': [{'id': 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx', 'datapoints': [{'time': '2021-02-01T09:54:05.4200000Z', 'value': -0.000286102294921875, 'status': 192}]}]}

The Protobuf response from Timeseries API looks like this:

{ "data": [ { "id": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "totalCount": "1", "fields": [ "time", "value", "status" ], "values": [ { "int64": "1727263834898000000" }, { "double": 246.56092834472656 }, { "uint32": 192 } ] } ] }

Other use cases

Please consult the API Reference for a full overview of the API endpoints.