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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 get_mapreduce_yaml(parse=parse_mapreduce_yaml):
 """Locates mapreduce.yaml, loads and parses its info. Args: parse: Used for testing. Returns: MapReduceYaml object. Raises: errors.BadYamlError: when contents is not a valid mapreduce.yaml file or the file is missing. """

  mr_yaml_path = find_mapreduce_yaml()
  if not mr_yaml_path:
    raise errors.MissingYamlError()
  mr_yaml_file = open(mr_yaml_path)
  try:
    return parse(mr_yaml_file.read())
  finally:
    mr_yaml_file.close()