如何从AWS DynamoDB python异常中提取异常消息？

Question

下面的Python代码块与AWS上的DynamoDB对话：

try:
    response = conn.batch_write_item(batch_list)
except Exception ,e:
    try:
        mess = e.message
    except:
        mess = "NOMESS"

    try:
        earg0 = e.args[0]
    except:
        earg0 = "NOEARG0"

    try:
        stre = str(e)
    except:
        stre = "NOSTRE"

    print "mess = '%s'" % mess
    print "earg0 = '%s'" % earg0
    print "stre = '%s'" % stre

我得到的是：

^{pr2}$

我需要从e中可靠地提取message字符串，例如'Item size has exceeded the maximum allowed size'。我该怎么做？在

Answer 1

以e.body为例，你会得到一个字典的错误。在

示例： {u“消息”：u“条件请求失败”，u“uu类型”：u'com.amazonaws.dynamodb网站.v20120810\ConditionalCheckFailedException'}

从这很容易你会得到信息。在