In Python 2, __repr__ and __str__ shouldn't return unicode.
This caused a problem for example when logging-debug a filter on Thumbnail.url,
as the logger couldn't encode the unicode repr.

Signed-off-by: Simon Lipp <laiquo@hwold.net>

Matthieu Weber authored Feb 08, 2015 and Romain Bignon committed Feb 08, 2015

Signed-off-by: Matthieu Weber <mweber+weboob@free.fr>
Signed-off-by: Romain Bignon <romain@symlink.me>

flake8 --select W391,E302,E301,E304

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

Make it consistent with "Current", accepting both date and datetime.

In __repr__ of Temperature object, the test "if self.value" failed if
the temperature is zero.

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

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

Diff quickly checked.

Close #843

Modules can raise this exception when they want to print errors to user