title: Run multiple find and replaces in Python (on every file in the folder and sub-folder)
body: <p>I have a folder (courses) with sub-folders and a random number of files. I want to run multiple search and replaces on those random files. Is it possible to do a wild card search for <code>.html</code> and have the replaces run on every html file ? </p>
  
  <p>Search and replaces:<li>
  1) <code>"&lt;/b&gt;"</code> to <code>"&lt;/strong&gt;"</code></li><li>
  2) <code>"&lt;/a&gt;"</code> to <code>"&lt;/h&gt;"</code></li><li>
  3) <code>"&lt;p&gt;"</code> to <code>"&lt;/p&gt;"</code></li><li></p>
  
  <p>Also all these replaces have to be run on every file in the folder and sub-folders.</p>
  
  <p>Thank you so much</p>