title: Python Packages
body: <p>I tried run this code that uses Google cloud. </p>
  
  <pre><code>import signal
  import sys
  
  from google.cloud import language, exceptions
  
  # create a Google Cloud Natural Languague API Python client
  client = language.LanguageServiceClient()
  </code></pre>
  
  <p>But it gives the following error message: </p>
  
  <pre><code>  Traceback (most recent call last):
    File "analyse-comments.py", line 7, in &lt;module&gt;
      client = language.LanguageServiceClient()
    File "C:\Python27\lib\site-packages\google\cloud\language_v1\gapic\language_service_client.py", line 92, in __init__
      scopes=self._DEFAULT_SCOPES)
    File "C:\Python27\lib\site-packages\google\api_core\grpc_helpers.py", line 132, in create_channel
      credentials, _ = google.auth.default(scopes=scopes)
    File "C:\Python27\lib\site-packages\google\auth\_default.py", line 283, in default
      raise exceptions.DefaultCredentialsError(_HELP_MESSAGE)
  google.auth.exceptions.DefaultCredentialsError: Could not automatically determine credentials. Please set GOOGLE_APPLICATION_CREDENTIALS or
  explicitly create credential and re-run the application. For more
  information, please see
  https://developers.google.com/accounts/docs/application-default-credentials.
  </code></pre>
  
  <p>and line 7 is this part of code </p>
  
  <pre><code> client = language.LanguageServiceClient()
  </code></pre>
  
  <p>i have already pip install google and cloud. And i have google for solutions, but none of the solutions fits what needs to solve in my situation. </p>