How to parse multilevel forms?

Question

Python

There is a three-level form, like:

--- Select1:
  option_1
  option_2
  option_...
  option_50
--- Select2:
  option_1
  option_2
  option_...
  option_35
--- Select3:
  option_a
  option_b
  option_...
  option_z

Those. there are a lot of possible combinations. After opening the results on each page, I get a list of the links I need, which later also need to be traversed and parsed (this has already been implemented).
Question: how to work with such forms? For example: if there are 1000 combinations. How can I go through them all?
I will add that all forms are loaded by ajax, and the result pages are generated by the system, i.e. I can not pick up the results by substituting parameters in the request.

Answer 1

If the elements of the selects can be arbitrarily combined with each other, i.e. each with each, then everything is very simple, we get the form data, no matter how, a simple or ajax request, we combine all the elements, then we send a request for each combination. piece of code to understand the principle:

print([[x, y, z] for x in range(3) for y in range(3) for z in range(3)])

# ну или на привычных циклах
res = []

for x in range(3):
    for y in range(3):
        for z in range(3):
            res.append([x, y, z])

print(res)

If the elements are combined according to certain rules, you need to build some combination graph.

Answer 2

working with AJAX +
While - if you can't
For - if you can
pick up the parameters

Answer 3

Do the values ​​for Select2 depend on the selected option in Select1? Do Select3 values ​​depend on the selected option in Select2? It is possible stupidly by a banal enumeration method.