Python PyYAML查找不正确YAML语法错误的行

我在读一个YAML文件。如果有语法错误导致异常，我会将异常发送给记录器。如何在我的日志消息中识别YAML文件的哪一行包含语法错误

try:
    with open(input_path, "r") as yaml_file:
        yaml_dict = yaml.load(yaml_file)
except FileNotFoundError:
    logger.error("YAML file {} does not exist".format(input_path), exc_info=True)
    sys.exit(1)
except:
    logger.critical("Error in reading or parsing YAML file {}".format(input_path), exc_info=True)
    sys.exit(1)

查看，查找

YAMLError（）

：

try:
    yaml.load("unbalanced blackets: ][")
except yaml.YAMLError, exc:
    if hasattr(exc, 'problem_mark'):
        mark = exc.problem_mark
        print "Error position: (%s:%s)" % (mark.line+1, mark.column+1)

Error position: (1:22)