title: Get pytest to look within the base directory of the testing script
body: <p>In pytest, my testing script compares the calculated results with baseline results which are loaded via</p>
  
  <pre><code>SCRIPTLOC = os.path.dirname(__file__)
  TESTBASELINE = os.path.join(SCRIPTLOC, 'baseline', 'baseline.csv')
  baseline = pandas.DataFrame.from_csv(TESTBASELINE)
  </code></pre>
  
  <p>Is there a non-boilerplate way to tell pytest to start looking from the root directory of the script rather than get the absolute location through SCRIPTLOC?</p>