Can not connect to PI server

[paitoncamp]

Hi its a great project that I found to implement PISDK as python library, I try to use this library but I got this error message, What should I do

D:\piconnect-test>python test1.py OSIsoft(r) AF SDK Version: 2.10.8.440 Traceback (most recent call last): File "D:\piconnect-test\test1.py", line 1, in <module> import PIconnect as PI File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\__init__.py", line 7, in <module> from PIconnect.PI import PIServer File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\PI.py", line 7, in <module> import PIconnect.PIPoint as PIPoint_ File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\PIPoint.py", line 3, in <module> import PIconnect._typing.AF as _AFtyping File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\_typing\__init__.py", line 1, in <module> from . import AF File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\_typing\AF.py", line 4, in <module> from . import PI, Asset, Data, EventFrame, Time, UnitsOfMeasure File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\_typing\PI.py", line 5, in <module> from . import Data, Generic, Time, _values, dotnet as System File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\_typing\Data.py", line 3, in <module> from . import Time, Generic File "D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\_typing\Time.py", line 2, in <module> from . import dotnet as System ImportError: cannot import name 'dotnet' from partially initialized module 'PIconnect._typing' (most likely due to a circular import) (D:\Programs\Python\lib\site-packages\piconnect-0.10.6-py3.9.egg\PIconnect\_typing\__init__.py)

[diegouriarte]

I've found the same problem in a new installation. Context:

• Windows 10 laptop
• Using anaconda
• Install using pip install pip install PIconnect
• When I run import PIconnect as PI I get the following

OSIsoft(r) AF SDK Version: 2.10.8.440

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
~\AppData\Local\Temp\ipykernel_38820\1377011707.py in <module>
----> 1 import PIconnect as PI

~\Anaconda3\lib\site-packages\PIconnect\__init__.py in <module>
      4 from PIconnect.AFSDK import AF, AF_SDK_VERSION
      5 from PIconnect.config import PIConfig
----> 6 from PIconnect.PI import PIServer
      7 from PIconnect.PIAF import PIAFDatabase
      8 

~\Anaconda3\lib\site-packages\PIconnect\PI.py in <module>
      4 from typing import Any, Dict, List, Optional, Union, cast
      5 
----> 6 import PIconnect.PIPoint as PIPoint_
      7 from PIconnect import AF, PIConsts
      8 from PIconnect._utils import InitialisationWarning

~\Anaconda3\lib\site-packages\PIconnect\PIPoint.py in <module>
      3 from typing import Any, Dict, Optional
      4 
----> 5 import PIconnect._typing.AF as _AFtyping
      6 from PIconnect import AF, PIData, _time
      7 

~\Anaconda3\lib\site-packages\PIconnect\_typing\__init__.py in <module>
      1 """Type stubs for the AF SDK and dotnet libraries."""
      2 
----> 3 from . import dotnet as System  # noqa: I001
      4 from . import AF
      5 

ImportError: cannot import name 'dotnet' from partially initialized module 'PIconnect._typing' (most likely due to a circular import) (C:\Users\R112619\Anaconda3\lib\site-packages\PIconnect\_typing\__init__.py)

So it seems at least recognizes the SDK version.

I would appreciate any advice

[Hugovdberg]

Apparently something has changed in the sdk version 2.10, that causes the import to partially fail. I will have to dig into the documentation to find out what has changed without backward compatibility.

[Hugovdberg]

Interestingly, I just noticed both of you experience this issue on SDK version 2.10.8.440, but on my system I have 2.10.9.593 and no issues. Also, looking closer at the stack trace I fails after the SDK is loaded, so no issues with the SDK or pythonnet.

I see in the error @paitoncamp posted it occurs in PIconnect 0.10.6 on Python 3.9, @diegouriarte what version of python and PIconnect are you running? I suspect that the last python 3.9 compatible version was actually faulty but that would only be an explanation if the both of you actually use that python version.

[diegouriarte]

Hi, yes my Python version is 3.9.13 and PIConnect version 0.11.2