google app engine is detecting python25 as default

hi i am trying to install Google app engine with windows MSI i have two python version on my windows one is python25 and other is python26, and i have开发者_运维知识库 python26 path set in my environmental variables, but Google app engine is detecting python25 as default prerequisite, what should i do which makes Google app engine to detect python26.

or if i let it to use python25 then can i change that later? and how?

At present, Google App Engine's production servers only run Python 2.5.2. You should be using Python 2.5 on the development server as well, as having a different environment for testing and production leads to scenarios where, for example, you use syntax that's valid in 2.6 which passes your tests fine, and the unexpectedly gives you frustrating errors when deployed to production.

It should be noted that the Python 2.7 runtime on the production servers is currently in the Trusted Testers stage, and should be available for use in the next few months, but until it is, it's best to stay with 2.5 for development.