title: set log severity on google cloud without using google-cloud-logging library
body: <p>I am trying to correctly output logs on my service running on google cloud, and for the most part they are correctly identified (<code>DEBUG</code> and <code>INFO</code> logs, being sent to <code>stdout</code>, are marked as info, whereas <code>WARNING</code>, <code>ERROR</code>, and <code>CRITICAL</code> logs are sent to <code>stderr</code> and are marked as error). Now, I am trying to get the exact severity out of them, without needing to use the <code>google-cloud-logging</code> library. Is there a way where I can accomplish this?</p>
  <p>Here an example of what I currently obtain is shown, with severity (icon on the left) matching whether the log comes from <code>stdout</code> or <code>stderr</code>.</p>
  <p><a href="https://i.stack.imgur.com/3i8dF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3i8dF.png" alt="google cloud logging example" /></a></p>
  <p>This is what I'm trying to obtain, but without using the <code>google-cloud-logging</code> library</p>
  <p><a href="https://i.stack.imgur.com/rqnZf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rqnZf.png" alt="expected log severities" /></a></p>
  <p>Edit:</p>
  <p>my logs are written to the output streams in json format, by using the <code>python-json-logger</code> library for python. My google cloud logs have their information stored as in the picture below. We are not using fluentd for log parsing.</p>
  <p><a href="https://i.stack.imgur.com/LF3on.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LF3on.png" alt="current log parsing structure" /></a></p>