This is how I managed to fix the problem:
class Archive(object):
d = dict(title='',author= '')
def load_d(self):
r = webapp2.get_request()
self.d['title'] = r.get('title')
self.d['author'] = r.get('author')
class Compose(Handler):
def get(self):
self.render('compose.html')
def post(self):
a = Archive()
a.load_d()