You can import any* python module and/or package into your Ask app. This is because Ask transpiles to Python. You can both import local .py files or modules & packages from the PyPI.
* = As long as it's name doesn't conflict with any built-in Ask functions/classes, you have it installed (if it's from the PyPI), and it's compatible with your Python version.
How To
You can import Python modules in the exact same way as you would in Python.
import modulefrom package import moduleimport module as namefrom package import*# etc.
You can then access the module's/package's functions and other properties with: [module/package name].[function/property/class/etc.]