title: extract values/renaming filename in python
body: <p>I am trying to use python to rename a filename which contains values such as:  <code>~test1~test2~filename.csv</code></p>
  
  <p>I want to rename the file to filename.csv.  The tildes being my separator for the first two words, and I do not want those words in my finale file name.  These words are variables.  Any assistance would be appreciated.  Thanks!</p>