Help installing Pyxid module into Open Sesame v3.3

MikeN

I am attempting to install the module "pyxid" into Open Sesame to allow it to communicate with the Cedrus "Stimtracker" unit we have in our lab. I am using the following command in the console window of Open Sesame to download & install Pyxid module from Anaconda.org :

!conda install -c conda-forge pyxid

This command returns the error message below:

"UnsatisfiableError: The following specifications were found

to be incompatible with the existing python installation in your environment:

Specifications:

- pyxid -> python[version='2.7.*|>=2.7,<2.8.0a0']

Your python: python==3.7.6=h5b45d93_2".

Does this error imply that Pyxid will only run with an installed Python of 2.7? if so will I have to downgrade to older python version in order to install & run Pyxid?

thanks,

Mike.

sebastiaan

Hi @MikeN ,

I don't have experience with the pyxid library myself, but my understanding is that it is indeed only compatible with Python 2. So you would have to use the Python-2-based package of OpenSesame to use it. Alternatively (and again if my understanding is correct), the pyxid2 package should be compatible with Python 3, and might therefore be a better option.

Cheers!

Sebastiaan

MikeN

Thanks @sebastiaan ,

Since pyxid2 wasn't available via Anaconda.org I installed pyxid2 using PIP but when I run the OpenSesame program which has an inline script

import pyxid2

it returns error message

exception message: No module named 'pyxid2'

I used the command pip freeze to check installed packages and it returned

pyxid2==1.0.1

So that suggests the pyxid2 module is installed?

Edwin

Hi @MikeN,

Did you install the package into a Python installation on your computer, or into the Python installation that comes with OpenSesame? If you're not on Linux, there is a difference between the two.

To install directly within OpenSesame, run the following in the Debug Window:

import pip

pip.main(["install", "pyxid2"])

That should install it within OpenSesame's version, I think.

MikeN

Hi @Edwin,

I originally installed it into both but still got the error message about pyxid2 not being installed.

I followed your suggestion and it seemed to complete the pyxid2 install but gave a permission error about an OpenSesame sub directory. I ran OpenSesame again but this time using "Run as Administrator" first. Re-running the pip install worked fine and the inline script was able to identify the Cedrus Stimtracker as being installed.

many thanks to both yourself and @sebastiaan! 😀

Mike.

Art

Hi Mike,

Care to point me out to the inline script you used for making pyxid2run with OS?

MikeN

Once I knew pyxid2 was installed I used the following script to check if Open Sesame could detect the stimtracker device. The print command wasn't really needed I just included it to make sure the stimtracker was detected.

import pyxid2
# get a list of all attached XID devices
devices = pyxid2.get_xid_devices()

# assign first device to variable dev
dev = devices[0]  

 # print name of first device to verify detection
print(dev)

dev.reset_base_timer()
dev.reset_rt_timer()

I haven't progressed much further since then so that's all the help I can offer I'm afraid. For more info on the commands check out the Cedrus support page : https://cedrus.com/support/xid/commands.htm

Art

Thanks Mike!

I decided to ask a clleague that's more knowledgeable than myself to dig into the Python code. Will see if they can manage.