Now a days you can learn almost anything by just visiting http://www.google.com. But if you are completely new to computers or internet then first you need to leanr those fundamentals. Next
you can visit a good e-learning site like - https://www.tutorialspoint.com to learn further on a variety of subjects.

import re

with open("path\url_example.txt") as file:
        for line in file:
            urls = re.findall('https?://(?:[-\w.]|(?:%[\da-fA-F]{2}))+', line)
            print(urls)

['http://www.google.com.']
['https://www.tutorialspoint.com']