docs: def readMyEC2Tag(tagName, connection=None):
    """
    Load an EC2 tag for the running instance & print it.
  
    :param str tagName: Name of the tag to read
    :param connection: Optional boto connection
    """
    assert isinstance(tagName, basestring), ("tagName must be a string but is %r" % tagName)
  
    # Load metadata. if == {} we are on localhost
    # http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AESDG-chapter-instancedata.html
  
    if not connection:
      # Assume AWS credentials are in the environment or the instance is using an IAM role
      connection = boto.ec2.connect_to_region(myRegion())
  
    return readInstanceTag(connection=connection,
                           instanceID=myInstanceID(),
                           tagName=tagName)