title: Python - Parsing and converting string into timestamp
body: <p>I have string in next format: <strong>2017-02-14T09:51:46.000-0600</strong>  </p>
  
  <p>What is the best approach to parse and convert string into timestamp?
    I have options to use regular expression or to write my own function for parsing, but are there any builtin methods which can help me?</p>