Error installing library

Sylvain

Hello,

OK I am trying to install the library shapely on windows through the open sesame interface.

So what I did:

import pip
pip.main(['install', 'shapely'])

And I do not know what happens but I got this error:

Collecting shapely
  Using cached https://files.pythonhosted.org/packages/7d/3c/0f09841db07aabf9cc387662be646f181d07ed196e6f60ce8be5f4a8f0bd/Shapely-1.6.4.post1.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "c:\users\user\appdata\local\temp\pip-build-1ybua7\shapely\setup.py", line 80, in <module>
        from shapely._buildcfg import geos_version_string, geos_version, \
      File "shapely\_buildcfg.py", line 200, in <module>
        lgeos = CDLL("geos_c.dll")
      File "C:\Program Files (x86)\OpenSesame\lib\ctypes\__init__.py", line 362, in __init__
        self._handle = _dlopen(self._name, mode)
    WindowsError: [Error 126] The specified module could not be found

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\user\appdata\local\temp\pip-build-1ybua7\shapely\

If anyone can help thanks a lot!

sebastiaan

Hi Sylvain,

This looks like a packaging bug in shapely. Have you tried installing shapely directly from PyPi, instead of through this direct URL?

Cheers,
Sebastiaan

Sylvain

Hey Sebastian,

Yeah it worked with PyPi but there is something I do not understand.
Is opensesame relying on the Python version and libraries within its own path or within the path of the system? I mean is opensesame like a virtualenv?

I am asking this question because in between another issue appeared, this time on an ubuntu machine.
I installed opensesame everything was working. Then I installed anaconda, modified the path of the system... updated it...

When I open opensesame I see this in the debug windows:

But something that is happening now and did not appear before, when I load an experiment I have briefly this error message:

And when I launch it in quick run, although it seems to work I got these errors message:

So what I think happened it that I modified something wrongly by installing anaconda or modifying the path.

I do not know how to proceed to get back to what I had before if have an idea thank you!

Best,

Sylvain

sebastiaan

Is opensesame relying on the Python version and libraries within its own path or within the path of the system? I mean is opensesame like a virtualenv?

It depends on how OpenSesame is installed. The Windows and Mac OS packages come with their own Python environment, which is based on Anaconda.

On Ubuntu, OpenSesame is installed into the normal Python environment of the system. This means that it's possible to get incompatibilities if you install other packages, such as through pip. In your case, you seem to have an incompatible version of psychopy, which gives an error. And you don't have fastnumbers installed, which just gives a warning.

One easy way to check where packages come from is to use the Python package manager in OpenSesame. For example, here you can see that my version of PsychoPy is installed into .local/lib/ meaning that it comes from pip.

Python packaging is messy!

Cheers!
Sebastiaan

Sylvain

Hello,

When I click on Plugin and Extension manager I do not have the same windows as yours. Is it the same thing as the Python package manager? I do not have this.

Oh ok I see well I installed fastnumbers now I do not have the first message anymore.
However I still have the error relative to psychopy. I have the version 1.85.3. Is it non compatible?

Thank you!

Sylvain

sebastiaan

When I click on Plugin and Extension manager I do not have the same windows as yours. Is it the same thing as the Python package manager? I do not have this.

Right, it's not installed by default on Ubuntu! (It is on Windows.) You can install it through pip (use pip3 for Python 3):

pip install python-qtpip

And no, it's different from the plugin and extension manager, which allows you to enable/ disable plugins and extensions, but not manage the Python environment.

However I still have the error relative to psychopy. I have the version 1.85.3. Is it non compatible?

It is. Actually, 1.85.3 is the version that is bundled by default with the Windows package of OpenSesame 3.2.4.

The error that you get is quite mysterious, and I suspect that you're not actually running the released version of PsychoPy 1.85.3. You can check this with the Python package manager once you have it installed!

Cheers,
Sebastiaan

Sylvain

Oh ok great thanks!
However I uninstalled anaconda and for some reasons it is working again without the errors I got.

Sylvain