title: 'HTTP headers is not in the correct format' error when creating Azure Container using Python SDK
body: <p>I'm trying to create an Azure blob container using Python SDK with the below code. I'm getting an 'ErrorCode:InvalidHeaderValue' in the response.</p>
  <p>I'm using the 'ConnectionString' from 'Access Keys' section from the Azure Portal of the storage account. And I don't think the connection is the issue since this line works ok <code>blob_service_client = BlobServiceClient.from_connection_string(connection_string)</code>.</p>
  <p>I used a clean venv for this and below are the library versions
  azure-core==1.10.0
  azure-storage-blob==12.7.1</p>
  <pre><code>import os
  import yaml
  from azure.storage.blob import ContainerClient, BlobServiceClient
  
  def load_config():
      dir_root = os.path.dirname(os.path.abspath(__file__))
      with open (dir_root + &quot;/config.yaml&quot;, &quot;r&quot;) as yamlfile:
          return yaml.load(yamlfile, Loader=yaml.FullLoader)
  
  config = load_config()
  connection_string = config['azure_storage_connectionstring']
  
  blob_service_client = BlobServiceClient.from_connection_string(connection_string)
  blob_service_client.create_container('testing')
  </code></pre>
  <pre><code>Traceback (most recent call last):
    File &quot;/Users/anojshrestha/Documents/codes/gen2lake/project_azure/lib/python3.7/site-packages/azure/storage/blob/_container_client.py&quot;, line 292, in create_container
      **kwargs)
    File &quot;/Users/anojshrestha/Documents/codes/gen2lake/project_azure/lib/python3.7/site-packages/azure/storage/blob/_generated/operations/_container_operations.py&quot;, line 134, in create
      raise HttpResponseError(response=response, model=error)
  azure.core.exceptions.HttpResponseError: Operation returned an invalid status 'The value for one of the HTTP headers is not in the correct format.'
  
  During handling of the above exception, another exception occurred:
  .......
  azure.core.exceptions.HttpResponseError: The value for one of the HTTP headers is not in the correct format.
  RequestId:5X-601e-XXXX00ab-5368-f0c05f000000
  Time:2021-01-22T02:43:22.3983063Z
  ErrorCode:InvalidHeaderValue
  Error:None
  HeaderName:x-ms-version
  HeaderValue:2020-04-08```
  </code></pre>