Add flake8 check

[refeed]

kiwix-build mainly comprises of Python codes, I think it'd be nice if this repository had a flake8 (which checks for codestyle and possible errors and bug (such as unused var, etc)) check in its Travis-CI.

[kelson42]

@refeed Why not, would be be able to make a PR to introduce it?

[refeed]

@refeed Alright, I'm gonna make a PR for it

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[HimanshuMahto]

is it still open if then i would like to work on it.

[kelson42]

@HimanshuMahto yes you can

[Rayan-Rasheed]

Is this issue still open? Because I want to work on it.

[kelson42]

@mgautierfr ?

[mgautierfr]

The issue is still open. But I strongly suggest that @Rayan-Rasheed and @HimanshuMahto discuss together before doing both the same work.
On my side I don't care about who does it. I will review the first PR coming (and accept the first acceptable one). I don't which to review to almost identical PR.

[Vishnurr2k01]

is this issue still available ?

[mgautierfr]

Yes.

[Anandbrewery]

is this issue still open?
i am interested to contribute for this

[kelson42]

Yes, I still want to have a formalism check of the Python code... but we should probably revide a bit the requirements. @benoit74 @rgaudin Could you please tell what should be respected to respect our standards? Maybe you could also point to a place where the check workflow ismproperly implemented already?