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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __RetrieveContent(host, port, adapter, version, path, keyFile, certFile, thumbprint, sslContext, connectionPoolTimeout=CONNECTION_POOL_IDLE_TIMEOUT_SEC):
 """ Retrieve service instance for connection. @param host: Which host to connect to. @type host: string @param port: Port @type port: int @param adapter: Adapter @type adapter: string @param version: Version @type version: string @param path: Path @type path: string @param keyFile: ssl key file path @type keyFile: string @param certFile: ssl cert file path @type certFile: string @param connectionPoolTimeout: Timeout in secs for idle connections to close, specify negative numbers for never closing the connections @type connectionPoolTimeout: int """


   # XXX remove the adapter and service arguments once dependent code is fixed
   if adapter != "SOAP":
      raise ValueError(adapter)

   # Create the SOAP stub adapter
   stub = SoapStubAdapter(host, port, version=version, path=path,
                          certKeyFile=keyFile, certFile=certFile,
                          thumbprint=thumbprint, sslContext=sslContext,
                          connectionPoolTimeout=connectionPoolTimeout)

   # Get Service instance
   si = vim.ServiceInstance("ServiceInstance", stub)
   content = None
   try:
      content = si.RetrieveContent()
   except vmodl.MethodFault:
      raise
   except Exception as e:
      # NOTE (hartsock): preserve the traceback for diagnostics
      # pulling and preserving the traceback makes diagnosing connection
      # failures easier since the fault will also include where inside the
      # library the fault occurred. Without the traceback we have no idea
      # why the connection failed beyond the message string.
      (type, value, traceback) = sys.exc_info()
      if traceback:
         fault = vim.fault.HostConnectFault(msg=str(e))
         reraise(vim.fault.HostConnectFault, fault, traceback)
      else:
          raise vim.fault.HostConnectFault(msg=str(e))

   return content, si, stub