Force run.sh to use python2

[BriceSD]

Short Description:

Force run.sh to use python2

[mention-bot]

@BriceSD, thanks for your PR! By analyzing the annotation information on this pull request, we identified @simonsmh, @03t02 and @mjmadsen to be potential reviewers

[simonsmh]

Great. I meet the same problem on some platform like termux which use python3 as default. Please tell me that every other platform support it. btw setup.sh need this improvement too.

[douglascamata]

Use virtualenv. Nobody is supposed to have the same python2 executable.

[elicwhite]

@douglascamata What do you want to do with this? I acknowledge that there is a problem where people are having it be run with python3 on their machines. We need to figure out something that is going to work easily for people.

Is python2 ever not installed when people install python?

[simonsmh]

@TheSavior I meet the same problem on some new platform like termux which use python3 as default. You have to install and use python2 which is very strange.

@ localhost in ~ [16:16:07]

$ python --version
Python 3.5.2

@ localhost in ~ [16:16:33]

$ python2 --version
Python 2.7.12
If every platform support to execute python2 , it is necessary. I don't have mac but this worked on Ubuntu/Debian/Centos.

[douglascamata]

@TheSavior it depends on how you install Python. By forcing the script to use a python2 executable you're restricting the way people can install Python. Python compiles by default to python executable, so we should use it. A simple code can be added to bot's initialization to identify the Python version and exit with a warning is on Python 3.

[BriceSD]

@douglascamata Oh I see, thought you could call python2 like this regardless of your install.
setup.sh doesn’t do a source bin/activate on an install, it does it only on updates. I guess this is what we should change.

Edit : nvm it does. Not sure why I have to do it manually after an update while using the script though.

[simonsmh]

@BriceSD you are using pip3
run pip2 install -r requirements.txt instead

[douglascamata]

@BriceSD I'm closing this because changing the python executable to python2 is not acceptable.