OpenBCI_Python: "NameError: global name 'Peripheral' is not defined"/ LINUX

aliraza · November 2018

Basically we are trying to connect our Ganglion device to python so we can build a real time application in python.
We have checked our device in Open_BCI GUI linux and its connecting properly.
we are trying to connect Ganglion device with OpenBCI_Python through linux using user.py but eventually ended up in a error named "NameError: name 'Peripheral' is not defined" in terminal . Can anyone help us to resolve it?

Specifications:

Ubuntu 18.04 LTS

Open_BCI Python downloaded and installed from github Link: (https://github.com/OpenBCI/OpenBCI_Python)
Installed all Requirements Link: (https://github.com/OpenBCI/OpenBCI_Python/blob/master/requirements.txt)
Python 3.6 and 2.7

pip3 and 2

Error details:

Picture in link: https://ibb.co/cnE4Sf

(Avoid semi colon in end, simply copy till 'f' and paste in browser)

1. It seems it is related to bluepy.btle

2. Tested with root privileges.

Solution Tried:
1. Different version of python (i.e 2.7 version)
2. Installed package using pip2 as well.
3. Installed updated version of bluepy to test. link: (https://github.com/IanHarvey/bluepy)

4. Tested on different system i.e Ubuntu 16.04 LTS on different pc but encountered same error in the end.

Extra information:
1.Device mac address shows in Hci tool le scan.

2. Device works properly with windows.

Please suggest some solution to our problem or an alternate way to connect our Ganglion device with python for application building.

aliraza · November 2018

Anyone please suggest a solution. I am still waiting.

wjcroft · November 2018

Another possible solution would be to use the networking widget in your GUI, to output a LabStreamingLayer stream. Then consume that stream with Python,

https://github.com/sccn/labstreaminglayer/wiki

https://github.com/sccn/labstreaminglayer/wiki/ExampleCode.wiki

wjcroft · November 2018

Please log the OpenBCI_Python errors at,

https://github.com/OpenBCI/OpenBCI_Python/issues

wjcroft · November 2018

Are you sure the Python external libraries (referred to here), are being correctly loaded?

https://github.com/OpenBCI/OpenBCI_Python/search?q=peripheral&unscoped_q=peripheral

aliraza · November 2018

The problem is similar to the problem mentioned in Issue 87.. As mentioned in issue 87 , I tried to comment out the specified line sys.path.insert(0,"bluepy/bluepy") but no luck.

from bluepy.btle import Scanner, DefaultDelegate, Peripheral

It says peripheral is not defined in error. So What do we define, or what is being missed here?
Please tell me how to be sure that python external libraries are correctly loaded.

I am working with built-in version of python (2.7) right now and I am sure that this is not any hardware issue. I Installed all mentioned requirements with specified version and checked the code in Open BCI_Python Ganglion.py which exactly matches the code you provided through link.

wjcroft · November 2018

Can you open or update an issue on this problem, and show how #87 is dealing with the same thing?

It looks like Python may have changed the way libraries work. Mentioning @techsupport.

aliraza · November 2018

I opened same issue over Github in OpenBCI_Python.
Link to issue #87 that is already being opened.

https://github.com/OpenBCI/OpenBCI_Python/issues/87

Link to mine's issue https://github.com/OpenBCI/OpenBCI_Python/issues/103

wjcroft · November 2018

Ali, thanks for logging this issue. HOWEVER, can you edit the title to be more accurate and descriptive to the exact error, which is: "NameError: global name 'Peripheral' is not defined". This is the same error that is showing up in the related issue 87.

Mentioning @techsupport.

William

aliraza · November 2018

The issue is resolved, By following suggestion given in #103 .
Thanks @wjcroft ;
Stay in touch

OpenBCI_Python: "NameError: global name 'Peripheral' is not defined"/ LINUX

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