title: ImportError: cannot import name 'BlobService' when using Azure Backend
body: <p>I followed these instructions to set up Azure as my backend service:
  <a href="http://django-storages.readthedocs.io/en/latest/backends/azure.html" rel="noreferrer">http://django-storages.readthedocs.io/en/latest/backends/azure.html</a></p>
  
  <p>Also added additional packages per this document:
  <a href="https://docs.microsoft.com/en-us/azure/storage/blobs/storage-python-how-to-use-blob-storage" rel="noreferrer">https://docs.microsoft.com/en-us/azure/storage/blobs/storage-python-how-to-use-blob-storage</a></p>
  
  <p>Getting this error:
  Traceback (most recent call last):</p>
  
  <pre><code>  File "/usr/local/lib/python3.6/site-packages/storages/backends/azure_storage.py", line 23, in &lt;module&gt;
      from azure.storage.blob.blobservice import BlobService
  ModuleNotFoundError: No module named 'azure.storage.blob.blobservice'
  </code></pre>
  
  <p>....</p>
  
  <pre><code>  File "/usr/local/Cellar/python3/3.6.2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, in import_module
      return _bootstrap._gcd_import(name[level:], package, level)
    File "&lt;frozen importlib._bootstrap&gt;", line 978, in _gcd_import
    File "&lt;frozen importlib._bootstrap&gt;", line 961, in _find_and_load
    File "&lt;frozen importlib._bootstrap&gt;", line 950, in _find_and_load_unlocked
    File "&lt;frozen importlib._bootstrap&gt;", line 655, in _load_unlocked
    File "&lt;frozen importlib._bootstrap_external&gt;", line 678, in exec_module
    File "&lt;frozen importlib._bootstrap&gt;", line 205, in _call_with_frames_removed
    File "/usr/local/lib/python3.6/site-packages/storages/backends/azure_storage.py", line 26, in &lt;module&gt;
      from azure.storage import BlobService
  ImportError: cannot import name 'BlobService'
  [12/Oct/2017 01:38:00] "POST /upload HTTP/1.1" 500 18034
  </code></pre>
  
  <p>My pip3 freeze looks like so:</p>
  
  <pre><code>(venv) Mikes-MacBook:drhazelapp mikebz$ pip3 freeze | grep azure
  azure==2.0.0
  azure-batch==3.0.0
  azure-common==1.1.8
  azure-datalake-store==0.0.17
  azure-graphrbac==0.30.0
  azure-keyvault==0.3.7
  azure-mgmt==1.0.0
  azure-mgmt-authorization==0.30.0
  azure-mgmt-batch==4.0.0
  azure-mgmt-cdn==0.30.3
  azure-mgmt-cognitiveservices==1.0.0
  azure-mgmt-compute==1.0.0
  azure-mgmt-containerregistry==0.2.1
  azure-mgmt-datalake-analytics==0.1.6
  azure-mgmt-datalake-nspkg==2.0.0
  azure-mgmt-datalake-store==0.1.6
  azure-mgmt-devtestlabs==2.0.0
  azure-mgmt-dns==1.0.1
  azure-mgmt-documentdb==0.1.3
  azure-mgmt-iothub==0.2.2
  azure-mgmt-keyvault==0.31.0
  azure-mgmt-logic==2.1.0
  azure-mgmt-monitor==0.2.1
  azure-mgmt-network==1.0.0
  azure-mgmt-nspkg==2.0.0
  azure-mgmt-rdbms==0.1.0
  azure-mgmt-redis==4.1.0
  azure-mgmt-resource==1.1.0
  azure-mgmt-scheduler==1.1.3
  azure-mgmt-sql==0.5.3
  azure-mgmt-storage==1.0.0
  azure-mgmt-trafficmanager==0.30.0
  azure-mgmt-web==0.32.0
  azure-nspkg==2.0.0
  azure-servicebus==0.21.1
  azure-servicefabric==5.6.130
  azure-servicemanagement-legacy==0.20.6
  azure-storage==0.34.3
  azure-storage-blob==0.37.0
  azure-storage-common==0.37.0
  azure-storage-file==0.37.0
  azure-storage-nspkg==2.0.0
  msrestazure==0.4.14
  </code></pre>