What data structure is recommended when processing machine learning

Question

What data structure should i use in python 3 using library as Numpy,Panda or matlopib know that i want to be able to make prediction of the retained value given

Answer 1

What if im trying to create a wholesale Store Stock Management app ,Should i use TST , List or Dictionaries and which one would work optimally

Answer 2

Im sure its not the only one but pandas DataFrame sounds perfect for this