title: Looping through url directory failing - Python 3.x
body: <p>I am trying to accomplish a rather simple task...</p>
  <p>I am looking to loop through all <code>.csv</code> files in a specified github repository, specifically, <a href="https://github.com/CSSEGISandData/COVID-19/tree/master/csse_covid_19_data/csse_covid_19_time_series" rel="nofollow noreferrer">this one</a></p>
  <p>The following <a href="https://stackoverflow.com/help/minimal-reproducible-example">minimal, complete, reproducible example</a> should demonstrate the problem:</p>
  <pre><code>import pandas as pd, urllib, requests, os, glob
  base_url = 'https://github.com/CSSEGISandData/COVID-19/tree/master/csse_covid_19_data/csse_covid_19_time_series'
  # https://stackoverflow.com/questions/39065921/what-do-raw-githubusercontent-com-urls-represent
  base_raw_url = 'https://raw.githubusercontent.com/CSSEGISandData/COVID-19/tree/master/csse_covid_19_data/csse_covid_19_time_series'
  
  #base_dir = os.listdir(base_url)
  #base_raw_dir = os.listdir(base_raw_url)
  
  # https://stackoverflow.com/questions/61036695/import-multiple-csv-files-from-github-folder-python-covid-19
  csv_files = glob.glob(base_raw_url+'/*.csv')
  print(csv_files)
  </code></pre>
  <blockquote>
  <p>[]</p>
  </blockquote>
  <p><code>csv_files</code> is an empty list, and both <code>os.listdir()</code> attempts result in:</p>
  <blockquote>
  <p>OSError: [WinError 123] The filename, directory name, or volume label
  syntax is incorrect:
  'https://raw.githubusercontent.com/CSSEGISandData/COVID-19/tree/master/csse_covid_19_data/csse_covid_19_time_series'</p>
  </blockquote>
  <p>How can I simply loop through the directory? I am looking to ultimately get the complete path (url) for each of the <code>.csv</code> files.</p>