Hi, I found two Python packages on PyPI — DatastreamUCS and DatastreamNavigator — that appear to be related to the Datastream Web Service. The PyPI author field lists "London Stock Exchange", and the packages seem to provide features not available in DatastreamPy, such as Navigator search integration and economic filter management. URLs: https://pypi.org/project/DatastreamNavigator/ https://pypi.org/project/DatastreamUCS/ However, I noticed that: * Neither package is referenced on the LSEG Developer Portal (developers.lseg.com) * The official DSWS documentation only mentions DatastreamPy * No source code repository (e.g. GitHub) appears to be publicly available for these packages * They seem to be not used in any LSEG-API-Samples repositories Could someone from the LSEG team please confirm the following: * Are these packages officially published and supported by LSEG? * If so, are they actively maintained and intended for production use? * What is the relationship between DatastreamPy and DatastreamUCS? Is one intended to replace the other? I am particularly interested in the DatastreamNavigator package, which seems to allow programmatic searching of instruments and datatypes via the Navigator service. If this is an official capability, it would be very useful for data discovery workflows. Thank you.

Are DatastreamUCS and DatastreamNavigator officially supported LSEG packages?

ryocci2025

Hi,

I found two Python packages on PyPI — DatastreamUCS and DatastreamNavigator — that appear to be related to the Datastream Web Service. The PyPI author field lists "London Stock Exchange", and the packages seem to provide features not available in DatastreamPy, such as Navigator search integration and economic filter management.

URLs:

https://pypi.org/project/DatastreamNavigator/
https://pypi.org/project/DatastreamUCS/

However, I noticed that:

Neither package is referenced on the LSEG Developer Portal (developers.lseg.com)
The official DSWS documentation only mentions DatastreamPy
No source code repository (e.g. GitHub) appears to be publicly available for these packages
They seem to be not used in any LSEG-API-Samples repositories

Could someone from the LSEG team please confirm the following:

Are these packages officially published and supported by LSEG?
If so, are they actively maintained and intended for production use?
What is the relationship between DatastreamPy and DatastreamUCS? Is one intended to replace the other?

I am particularly interested in the DatastreamNavigator package, which seems to allow programmatic searching of instruments and datatypes via the Navigator service. If this is an official capability, it would be very useful for data discovery workflows.

Thank you.

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Accepted answers

wasin.w V3

Hello @ryocci2025

I got an information from the product team.

The DatastreamNavigator, DatastreamUCS, and DatastreamPy libraries are created and supported by LSEG.

However, the DatastreamPy will be our strategic library going forward.

I hope this information helps you.

All comments

wasin.w V3

Hello @ryocci2025

The current strategic Python library for the https://developers.lseg.com/en/api-catalog/eikon/datastream-web-service API is the https://pypi.org/project/DatastreamPy/ library. The DataStreamPy is a successor to the legacy https://pypi.org/project/DatastreamDSWS/ library.

I am contacting the DataStream team to get more information about the DatastreamNavigator and DatastreamUCS libraries and get back to you.

Jirapongse

@ryocci2025

As far as I know, the DatastreamPy includes the features from DatastreamUCS.

I checked and found the DatastreamPy also works with the DatastreamNavigator.

It will launch the Datastream Navigator Website.

ryocci2025

I appreciate you reaching out to the Datastream team.

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ryocci2025

That's useful to know that DatastreamPy also works with DatastreamNavigator. Thank you for checking.

ryocci2025

To clarify, my core concern is not so much about functionality, but about trust and security. Specifically:

Are DatastreamUCS and DatastreamNavigator officially published by LSEG? The PyPI author field says "London Stock Exchange", but as PyPI does not verify author metadata, anyone could set that value.
Are these packages actively maintained and supported by LSEG? If they are official but deprecated or unmaintained, that would also affect my decision to use them.

Thank you again for your help.

Jirapongse

@ryocci2025

The DatastreamPy includes the features from the DatastreamUCS so I think you should use DatastreamPy.

However, I will contact the product team to confirm it.

wasin.w V3

Hello @ryocci2025

I got an information from the product team.

The DatastreamNavigator, DatastreamUCS, and DatastreamPy libraries are created and supported by LSEG.

However, the DatastreamPy will be our strategic library going forward.

I hope this information helps you.

ryocci2025

Thank you both for taking the time to check with the product team and provide a clear answer.

It's great to know that all three libraries are officially created and supported by LSEG.

I really appreciate your help!

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