Need to access self.request.GET from main.py in lib.py

Question

I need to do calculations among other things within lib.py and I need to access the user input data within main.py for it, because it needs to be that way. How do I do this?

doing from main import MainHandler in lib.py and then calling it "works" in the sense that it doesn't give any code errors, but displays a blank page when done that way and I get a log error saying that I cannot import it.

main.py

import webapp2
from lib import FormData
from pages import FormPage
from pages import ResultsPage


class MainHandler(webapp2.RequestHandler):
    def get(self):
        f = FormPage()
        s = ResultsPage()
        fd1 = FormData()

    if self.request.GET:
        fd1.name = self.request.GET['name']
        fd1.email = self.request.GET['email']
        fd1.weight = self.request.GET['weight']
        fd1.height = self.request.GET['height']
        self.response.write(s.second_page(fd1.name, fd1.email, fd1.weight, fd1.height))
    else:
        self.response.write(f.form_page)

app = webapp2.WSGIApplication([
('/', MainHandler)
], debug=True)

lib.py

class FormData(object):
    def __init__(self):
        pass

I need to be able to access:

fd1.name = self.request.GET['name']
fd1.email = self.request.GET['email']
fd1.weight = self.request.GET['weight']
fd1.height = self.request.GET['height']

In lib.py

Answer 1

Your if/else statement is outside the get method, so it shouldn't even work properly.

I think the most clean way would be to pass the request data to the FormData class already in the initialiser. So the code would look like this:

main.py

import webapp2
from lib import FormData
from pages import FormPage
from pages import ResultsPage


class MainHandler(webapp2.RequestHandler):
    def get(self):
        f = FormPage()
        s = ResultsPage()
        fd1 = FormData(data=self.request.GET)

        if fd1.name: # This is None, if form has not been submitted
            self.response.write(s.second_page(fd1.name, fd1.email, fd1.weight, fd1.height))
        else:
            self.response.write(f.form_page)

app = webapp2.WSGIApplication([
    ('/', MainHandler)
], debug=True)

lib.py

class FormData(object):

    def __init__(self, data):
        self.name = data.get('name')
        self.email = data.get('email')
        self.weight = data.get('weight')
        self.height = data.get('height')

As a side note, I don't really know this webapp2 framework, so there might be a better way to do this.