Upgrading to Python 2.7 Google App Engine 500 server error

Question

I just started using Google App Engine and I am very new to Python. I may have made a stupid mistake or a fatal error, I don't know, but I realized that the basic "template" I downloaded from a website was old and used Python 2.5.

So, I decided to update to Python 2.7 (after recieving a warning in the site's dashboard).

I have no idea how to do this, but I blindly followed some instructions on how to update but I'm not sure what I did wrong.

I know that I downloaded Python 2.7 (as the download path is C:/Python27/), so there shouldn't be a problem there. Can anybody tell what I'm doing wrong?

Answer 1

Thank you everyone for your respective answers and comments, but I recently stumbled upon GAE boilerplate and decided to use that and everything's fine. I kept having very odd problems with GAE beforehand, but the boilerplate is simple and seems to be working fine so far. Anyways, thanks again. (Note: I would delete the question but two people have already answered and received rep from +1s, and they are in fact helpful answers, so I'll leave it be).

Answer 2

I'm submitting as an answer because I'm relatively new to SO and don't have enough rep to comment, so sorry about that... But line 7 of your new main.py uses webapp instead of webapp2, so that may be causing some troubles, but likely isn't the reason that it's not working. Could you also provide the contact.html template?

Answer 3

I'm not sure if this is your formatting when you loaded your code here, but where you define app in main.py should not be part of the contacts class. If it is, your reference to main.app in your app.yaml won't work and your page won't load.