OSIsoft Python Library for data science
As a data scientist, I would like to be able to use a fully supported OSIsoft Python library without having to directly interface my Python script with a middleware. This OSIsoft Python library would be able to perform the same operations as PI DataLink, but directly in Python. Having this OSIsoft Python library would be beneficial for me because it would greatly improve the time needed to create data analysis scripts and make it a lot easier to interface with 3rd party Python libraries like Pandas for data analysis.

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Sergej commented
Check this lib for R. to easily create DataFrames from PI point arrays.
https://github.com/sergejhorvat/PIwebAPI4R
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Mansour2010 commented
if fact a lot of clients are looking to the same feature
on the other hand, so far, as a developer i have no issue to use 3rd party Lib of Python and ML.NET will PI AF SDK