How to generate a two column and 21 row file with random values and the random() method in Python

I need to generate a two column and 21 row file with random values using file operations and random method in Python.

Example

Num0 0.283740
Num1 0.394882
Num3 0.384844

Read in the file, output the two columns in ascending order of random values Identify the min, max, median, mean of the values

must use the random.random() method

so far, I have:

import numpy as np 
import pandas as pd 
mylist = pd.DataFram(np.random.randomint(0,100,size=21,1)), 
columns=list(' '))
mylist