Fix locating system python when it's not in $PATH (weird but happens, apparently)

[ghost]

Testing a fix for locating system python on travis. This will most likely not work yet but I need to see the travis output to figure out what is wrong (it's a travis-specific problem) hence I'm already making the pull request This fixes the tests breaking when the system python is not in the $PATH env var for some reason (usually that doesn't happen, but with travis & python3.7 for some reason it does)

[ghost]

@opacam this appears to make it work, the main remaining issues being that virtualenv needs to be installed for every python version (including the new python 3.7, which doesn't seem to have it right now) and that #1852 also needs to be merged to get rid of all the test errors

[ghost]

For what it's worth, the problem was that travis uses a python that is not in $PATH. I have never seen that before so the code trying to locate the system python didn't handle this, but it should work now with this pull request 👍 😄

[opacam]

Thanks @Jonast for the quick fix ❤️

👍 👏

It would be great that @AndreMiras or @inclement took a look on this and click the merge button if they are fine with this...

About the suggestions: feel free to apply that if you want but since that seems that you are the maintainer of this part of code, it's fine to me to keep that in your code style 😉

[ghost]

fne to me to keep that in your code style

my style is ugly 😱 lol. I just tend to forget, always good to poke me about it

[opacam]

Aaa...don't worry about the code style...I have a solution for that

I will tell you my secret...I tend to use a little trick before commit/push anything...:laughing:

There is a python module named black wich formats the code in a nice way...since I discovered that, it has been arround my head that we should make use of this module in p4a...it would allow us to forget about those code style discussions and focus with the important stuff. It can be integrated with travis (to perform a code style test and uses a pyproject.toml file to do the configuration). It also can be executed targeting a file only or a folder.

I really recommend you that take a look on this project, I think that it's worth it 😉

[opacam]

¡¡¡Good work @Jonast!!!
👍

[inclement]

Looks like travis failed because the last run predates the wheel fix, I've set it running again.