How to use random.uniform function in for Loop and store the values in a variable for each execution

I have 1000 rows * 100 columns dataset. wanted to generate Random number with the help of these data. specifically for a some columns. say 20 columns.

have performed - random.randrange(min(dataset["col_1"]),max(dataset["col_1"])).

since I have float data, randrange functions gave an error. So tried with random.uniform(). It works, but I have many columns to do the same job. So wanted to create a function using a loop.

What I wanted to have is n variables with the random values generated. Wanted to save the numbers along with the name for each.

How to create a function with a loop? so that, whenever I pass a list of columns in the dataset, It should give me a value for each column.

sample data

Cat-1   old-1   New-1   Old-2   New-2   W1      W2
RICE            0.05    0.48    0.47    10775   9087
RICE    0.26    0.05    0.45    0.24    15486   16335   
RICE    0.34    0.05    0.38    0.23    9774    8384    
RICE    0.30    0.05    0.42    0.23    7292    6390    
RICE    0.32    0.05    0.40    0.23    7103    6275    
RICE    0.29    0.05    0.39    0.27    6712    6095    
RICE    0.26    0.05    0.40    0.29    6358    5774    
RICE    0.25    0.05    0.41    0.29    6005    5453    
RICE    0.34    0.05    0.61            5652    5132

expected output:

old-1   0.31
New-1   0.05
Old-2   0.43
New-2   0.24