I recently started using Python for task automation... for example you want to send some automatic emails ... you want to schedule some tasks to run everyday in a specific time...etc. There is a library called pyautogui.. you can install it from pip... it is very interesting. .. you can use it to control mouse movements and clicks as well as controling the keyboard. .. Search the internet for a book called: 'automate the boring stuff with python'... it is complete there on the Internet for free
Aside from automation... you can use a library called kivy... this library is for making android apps using python ... not a bad one but not as powerful as native android apps written in java... also learning how to use kivy is not very easy so you might find it better to learn java instead! ! (Like I did)
You can use pyQt ... another library which works in integration with Qt designer.. a desktop applications designer similar in flexibility to vbstudio.. originally made for c++ but with pyQt python also can be used
Good luck :)