title: AttributeError: 'NoneType' object has no attribute 'endswith'
body: <p>I am currently working on a Python script that updates a web page. But running the main script generates this error:</p>
  
  <pre><code>&lt;res status='-1'&gt;&lt;error message="'NoneType' object has no attribute 'endswith'"&gt;&lt;![CDATA[
  Traceback (most recent call last):
    File "/path/to/file/ws_config.py", line XXXX, in Run
      tests = TestList().tests
    File "/path/to/file/ws_config.py", line XXXX, in __init__
      UpdateTestGroup(None),
    File "/path/to/file/ws_config.py", line XXXX, in __init__
      test = CT.CurlTest(settings),
    File "/path/to/file/config_tests.py", line XXXX, in __init__
      self.params.path = os.path.join('/', os.path.join(params.dir, params.file))
    File "/usr/lib/python2.6/posixpath.py", line 67, in join
      elif path == '' or path.endswith('/'):
  AttributeError: 'NoneType' object has no attribute 'endswith'
  </code></pre>
  
  <p>I cannot past any code because is too long. What I am trying to understand is where the error lays or what part of the code is triggering the AttributeError.
  Can you please help me???</p>