[google-appengine] Is there any alternative pythonic way to implement javascript`s onClick() function in pure python?

I'm looking to use GET a JavaScript var into a python's function similarly as we request a value for text filed >>> self.request.get("name_of_the_txt_field_to_get") but I want the variable to a be an image SRC with a onClick(); button fucntion, but only this time I want to pass this SRC value t

[google-appengine] GAE self.request.get IMG SRC to passing as a arguments to python function

Is there any way to get a img src? the images are not in database its in the html, say for eg: in index.html I have some images & a user clicks on a image the page redirects to images.html via a onClick js function with that selected image rendering on images.html, Now to work with that image I