Webapp2 + WTForms issue: How to pass values and errors back to user?
I think this will work if the routes are part of the same app.
But why not using a single handler with get and put and a method _create, which can be called (self._create instead of a redirect) by get and put to render the template with the form. It is faster than a browser redirect and you can pass arguments in an easy way.
I am having a problem with webapp2 and wtforms. More specifically I have defined two methods in two different handlers, called:

create, which is a GET method listening to a specific route
save, which is a POST method listening to another route

In the save method I validate my form and if fails, I want to redirect to the create method via the redirect_to method, where I can render the template with the form. Is this possible with any way? I found an example on how this can be done if the same handler with get and post methods, but is this possible in methods of different handlers? 
Thanks in advance!