pep8 fixes, modernizations

autopep8 -a -r -i --select E711,E712,W601,W602,W603,W604,W690,E304,E401,E502 .
Also includes some manual reindentations (many are left after the print()
changes).
Manually checked, some modernizations not commited here.

weboob/tools/application/console.py

@@ -520,7 +520,7 @@ class ConsoleApplication(Application):
                 text = f.read()
         else:
             if self.stdin.isatty():
-                print('Reading content from stdin... Type ctrl-D ' \
+                print('Reading content from stdin... Type ctrl-D '
                           'from an empty line to stop.')
             text = self.stdin.read()
         return text.decode(self.encoding)