How to generate random numbers with if-statement in Python?

I would like to generate random numbers with a specific restriction using python. The code should do the following:

If an entered number is:

<26, then generate 5 random non-recurrent numbers
<51, then generate 8 random non-recurrent numbers
<91, then generate 13 random non-recurrent numbers
...

The value of the random numbers should be limited by the value of the entered number. So if a 75 is entered, then the code should generate 13 random numbers with being 75 the highest value of the 13 numbers. 75 don't has to be the actual highest number, just in terms of max value.

My guess was to use numpy. Here is what I got until now (with the an users help).

num_files=[0,1,9,...] 
num_nums=[0,1,2,3,5,...]
for zipp in zip(num_files,num_nums)
if len(docx_files)<zipp[0]:
list_of_rands=np.random.choice(len(docx_files)+1, 
zipp[1],replace=False)

Any ideas or more starting points?