Python fails to “from pcan.PCANBasic import *”

[jjollota]

I have seen a number of posts about this topic, and I believe I have tried everything that was suggested, but I cannot get this pcan.PCANBasic import to work.

I have tried:
• Installed latest PEAK-System_Driver-Setup
• Verified 64bit DLL in System32 and 32bit in SysWow64
• Tried copying each PCANBasic.DLL to local directory.

Should there be an explicit PATH statement with “pcan” in it?
Any other steps to isolate the problem?

Thanks,
Jim

[M.Heidemann]

Hello,

Is the header file "PcanBasic.py" present?

BR

Marvin

[jjollota]

Yes, I have everything in one directory, including the PCANBasic.py.

Jim

[M.Heidemann]

Hello,

Can you share part of your code, especially the imports?

[jjollota]

Yes, it is the start of the python file:

Code: Select all

try:
    from tqdm import tqdm
    from pcan.PCANBasic import *
    import ctypes
except ImportError:
    print('[ERROR] Dependant modules not available of PCANBasic.')
    print('')
    sys.exit()

And it fails on the pcan.PCANBasic import line

[K.Wagner]

Hello,

if you have the drivers and PCAN-Basic installed (PEAK-Drivers Setup), and also Python, then you should be able to load and use the library. It could be a problem with environment configuration in Pyhton itself. Which Python version are you using? which OS are you using?

In normal cases, you should be able:

• to compile and launch the Pyhton samples contained in the PCAN-Basic package (console and GUI. The last one uses tkinter).

  

  Pyhton2.png (113.58 KiB) Viewed 1091 times

• to load the PCANBasic.py module with Python IDLE and run it. Over the console then directly call the API functions.

  

  Python.png (51.31 KiB) Viewed 1091 times

Please try downloading the PCAN-Basic package (if you do not have it), and give the sample projects a try.

[jjollota]

Keneth,
Thank you for your help on this. I am not a Python-guy, but your examples were key. Your examples imported the library via "from PCANBasic import *", but the example code I got from the microprocessor company was "from pcan.PCANBasic import *". I don't know the ramifications of the difference, but your line does not exception.
Thanks,
Jim

[K.Wagner]

Hello,

OK. I missed the incorrect import in your code.
Thanks for the feedback.

Closed.