Python / AJAX / JavaScript - 在GET期间两次打印HTML页面

I currently have an issue with my program in which I'm trying to produce live search (much like Google's) using AJAX. At the moment, its based on a list of cities, so when a user types for example "A" in the form, it will show a list of all cities that start with "A". If the user continues to type, for example "Al", it will show a list of all cities that start with "Al" and so on and so forth.I currently have an issue with my program in wh