title: requests.exceptions.MissingSchema: Invalid URL 'channel_url': No schema supplied. Perhaps you meant http://channel_url?
body: <p>I want to check the latest video of the Youtube channels given from a CSV file and retrieve the description. </p>
  
  <p>I am getting this error:</p>
  
  <pre><code>ERROR : requests.exceptions.MissingSchema: Invalid URL 'channel_url': No schema supplied. Perhaps you meant http://channel_url?
  </code></pre>
  
  <p>Here is my code:</p>
  
  <pre><code>#!/usr/bin/env python
  
  import requests
  from bs4 import BeautifulSoup
  import csv
  
  with open('motovloggers.csv', 'r') as data_csv:
      data = csv.reader(data_csv)
  
      for channel in data:    
          url = channel[2]
  
          r = requests.get(url)
  
          soup = BeautifulSoup(r.content, 'html.parser')
          print(soup.select_one('.yt-lockup-title a')['title'])
          link = (soup.select_one('.yt-lockup-title a')['href'])
  
          # # new_link = link.replace('watch?v=', 'embed/')
  
          print('https://www.youtube.com' + link)
  
          # video = pafy.new(url)
          # print(video.description)
  </code></pre>
  
  <p>How can it be resolved?</p>