def CheckCondition(condition, check_object):
  """Check if a condition matches an object.

  Args:
    condition: A string condition e.g. "os == 'Windows'"
    check_object: Object to validate, e.g. an rdf_client.KnowledgeBase()

  Returns:
    True or False depending on whether the condition matches.

  Raises:
    ConditionError: If condition is bad.
  """
  try:
    of = objectfilter.Parser(condition).Parse()
    compiled_filter = of.Compile(objectfilter.BaseFilterImplementation)
    return compiled_filter.Matches(check_object)
  except objectfilter.Error as e:
    raise ConditionError(e)
Check if a condition matches an object.

  Args:
    condition: A string condition e.g. "os == 'Windows'"
    check_object: Object to validate, e.g. an rdf_client.KnowledgeBase()

  Returns:
    True or False depending on whether the condition matches.

  Raises:
    ConditionError: If condition is bad.