Legacy app engine python 2.7 supports an application at google.appengine.ext.admin.application that can be used in the config file with a route to create a mini app that among other things has a console textbox. This is super useful for quick experimentation and quickly running snippets of code without uploading a new version of the code. This is documented here for the development server but works on the cloud server as well.
Does anybody knows whether this functionality migrated to the python 3 standard environment?