TouchScreen

Arnaud Boré

Dear Expyriment's expert,

I work on a project where I'll need to use a touchscreen.
I found that the example that you've got : line-bisection.py doesn't work on my computer and laptop.
I've got this error:

ImportError: cannot import name defaults

Do I get this error because it was written with an older version of expyriment ?
Do you have another example ?

fladd

Can you give me the full error message?

My suspicion is that you have a file called test.py in the same directory, leading to overwriting the internal test package from future (which is a new dependency of Expyriment 0.9.0).

Arnaud Boré

My mistake (I had a test.py), I think we can delete this discussion.

fladd

Glad to hear it is resolved. No need to delete the discussion though. Might be helpful for others in the future.

Best,
Florian

Arnaud Boré

Ok, I think we can continue with this discussion since I've got a new error with this script.
I get this message:

File "line-bisection.py", line 77, in <module>
    touchButtonBox.show()
  File "...expyriment/io/_touchscreenbuttonbox.py", line 170, in show
    self.create()
  File "...expyriment/io/_touchscreenbuttonbox.py", line 156, in create
    raise RuntimeError("No button field defined!")
RuntimeError: No button field defined!

Thank you in advance for your help

oliver

This is indeed a bug in Expyriment 0.9. It has something to do with newly introduced Python3 compatibility. I have fixed it and the issue will be therefore solved with the next Expyriment release.

We will come back to you very soon for a temporary solution, which you can apply in the mean time.

fladd

Dear Arnaud,

you could use the current development version of Expyriment (which has the bug already fixed):

• Download the source archive
• Unzip the source archive
• In the command line navigate into the unzipped directory and call:
  python setup.py install