TODO this is less efficient on python2

Some functions changed return type from python2 to python3

TODO: not everything is tested, a full review is needed + run is needed

With: futurize -w -1 weboob

In PyQt5.6, connect() does strict checking of the signal signature
against the Slot decorator types, so "@slot(object)" is not a catch-all
anymore.

git grep '<class>' | awk -F : '{print $1}' | while read name; do sed -i 's/<class>/ &/' $name ; done

hydrargyrum authored Feb 12, 2016 and Romain Bignon committed Feb 13, 2016

This Model can be used in backend choice widgets. It fills the list with
available backends and icons. It can separate capabilites too.

flake8 --select E713, semi-manual fixing

flake8 --select W391,E302,E301,E304

autopep8 can't fix W391 even though it claims it can.
Fixed using a simple custom script.

This is a cleaner approach that requires less configuration
in other applications.
This also easily allows us to have another color.

Many checks were made on being exactly at the DEBUG level, they were
fixed to also check on being below DEBUG (i.e. DEBUG_FILTERS).

python modernize.py --no-six -f libmodernize.fixes.fix_print -w

With manual fixes as the import was put always on top.

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

autopep8 -ir -j2 --select=E303,E125
Diff checked manually.

This is recommended by Debian.
closes #618