Installing Psychopy 1.85.3

Coding
1

Dear all,

I developed my experiment using Psychopy 1.85.3. Unfortunately, the IT upgraded Psychopy to version 2020.1.2.

I tried to install again a previous version by using this code in the .py file:

import psychopy
psychopy.useVersion('1.85.3')

However, this only works with python3 versions of Psychopy, as it can be seen from the error I get:

6.0460     ERROR     Please request a version of PsychoPy that is
compatible with Python 3. You can choose from the following versions: 
['latest', '3.2.4', '3.2.3', '3.2.2', '3.2.1', '3.2.0', '3.2', '3.1.5', 
'3.1.4', '3.1.3', '3.1.2', '3.1.1', '3.1.0', '3.1', '3.0.7', '3.0.6', 
'3.0.5', '3.0.4', '3.0.3', '3.0.2', '3.0.1', '3.0.0', '3.0', '2020.2.3', 
'2020.2.2', '2020.2.1', '2020.2.0', '2020.2', '2020.1.3', '2020.1.2', 
'2020.1.1', '2020.1', '2020', '1.90.2', '1.90.1', '1.90.0', '1.90']. 
Alternatively, run a Python 2 installation of PsychoPy < v1.9.0.

So, how can I go back to version 1.85.3?

2

In order to run 1.85.3 you would need to downgrade your version of Python itself from 3 to 2, however what breaks in your experiment when you upgrade to the latest version of PsychoPy? It might be easier (and certainly more futureproof) to update your experiment