Creating variable number of variables in python

Question

I am trying to create a variable number of variables (arrays) in python.

I have a database from experiments and I am extracting data from it. I do not have control over

Answer 1

I took a look at similar questions, but multi dimension arrays won't work as each arr1 can have different size.

-- but a list of arrays will work, because items in a list can be anything, including arrays of different sizes.