title: Pydrive backend not working with duplicicty -- python
body: <p>I'm trying to use duply / duplicity with the PyDrive. However I keep getting a very cryptic error message telling me to refer to the PyDrive installation manpage. Which offers no solution.</p>
  
  <p>Here's the output of the duply command I'm running including the error. </p>
  
  <pre><code>$ duply mac-mini.gdrive status
  Start duply v1.11.1, time is 2016-02-20 19:28:59.
  Using profile '/etc/duply/mac-mini.gdrive'.
  Using installed duplicity version 0.7.06, python 2.7.10, gpg 1.4.19 (Home: ~/.gnupg), awk 'awk version 20070501', grep 'grep (BSD grep) 2.5.1-FreeBSD', bash '4.3.42(1)-release (x86_64-apple-darwin14.5.0)'.
  Checking TEMP_DIR '/tmp' is a folder and writable (OK)
  Test - En/Decryption skipped. (GPG disabled)
  
  --- Start running command STATUS at 19:29:00.000 ---
  BackendException: PyDrive backend requires PyDrive installationPlease read the manpage to fix.
  19:29:00.000 Task 'STATUS' failed with exit code '23'.
  --- Finished state FAILED 'code 23' at 19:29:00.000 - Runtime 00:00:00.000 ---
  </code></pre>
  
  <p>I'm running OS X 10.11.3, have brew and pip installed. I've used pip to install pydrive.</p>
  
  <pre><code>$ pip install pyDrive
  Requirement already satisfied (use --upgrade to upgrade): pyDrive in /Library/Python/2.7/site-packages
  Requirement already satisfied (use --upgrade to upgrade): google-api-python-client&gt;=1.2 in /Library/Python/2.7/site-packages (from pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): PyYAML&gt;=3.0 in /Library/Python/2.7/site-packages (from pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): six&lt;2,&gt;=1.6.1 in /Library/Python/2.7/site-packages (from google-api-python-client&gt;=1.2-&gt;pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): oauth2client&lt;3,&gt;=2.0.0 in /Library/Python/2.7/site-packages (from google-api-python-client&gt;=1.2-&gt;pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): httplib2&lt;1,&gt;=0.8 in /Library/Python/2.7/site-packages (from google-api-python-client&gt;=1.2-&gt;pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): uritemplate&lt;1,&gt;=0.6 in /Library/Python/2.7/site-packages (from google-api-python-client&gt;=1.2-&gt;pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): pyasn1&gt;=0.1.7 in /Library/Python/2.7/site-packages (from oauth2client&lt;3,&gt;=2.0.0-&gt;google-api-python-client&gt;=1.2-&gt;pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): pyasn1-modules&gt;=0.0.5 in /Library/Python/2.7/site-packages (from oauth2client&lt;3,&gt;=2.0.0-&gt;google-api-python-client&gt;=1.2-&gt;pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): rsa&gt;=3.1.4 in /Library/Python/2.7/site-packages (from oauth2client&lt;3,&gt;=2.0.0-&gt;google-api-python-client&gt;=1.2-&gt;pyDrive)
  Requirement already satisfied (use --upgrade to upgrade): simplejson&gt;=2.5.0 in /Library/Python/2.7/site-packages (from uritemplate&lt;1,&gt;=0.6-&gt;google-api-python-client&gt;=1.2-&gt;pyDrive)
  </code></pre>
  
  <p>And for referenece I'm running current versions of both duplicity and duply.</p>
  
  <pre><code>$ duply -V
    duply version 1.11.1
    (http://duply.net)
  
    Using installed duplicity version 0.7.06, python 2.7.10, gpg 1.4.19 (Home: ~/.gnupg), awk 'awk version 20070501', grep 'grep (BSD grep) 2.5.1-FreeBSD', bash '4.3.42(1)-release (x86_64-apple-darwin14.5.0)'.
  </code></pre>