Question

我有一个RESTful API调用cwObj.get_opportunities()，以JSON响应的形式返回一组记录。从响应中，我针对第二个API调用ID引用了每个记录中的cwObj.get_tickets_by_opportunity()。此调用将返回第二组记录。但是，通常在第二个API调用返回的JSON响应中没有特定ID的记录。 API期望每个单独的调用都有记录，因此，如果没有记录，则会抛出IndexError: list index out of range。此外，当我对第二个API调用中引用的ID进行硬编码时，我可以毫无错误地检索到我想要的数据。

注释：cwObj是我的API调用的基础...

opportunities = cwObj.get_opportunities()

for opportunity in opportunities:
    try:
        temp = opportunity['id']
        opportunity_id = str(temp)
        presales_ticket = cwObj.get_tickets_by_opportunity(opportunity_id)
        presales_engineer = presales_ticket[0]['owner']['name']
    except KeyError:
        presales_engineer = None

Answer 1

我不知道我是否很好地理解了这个问题。您基本上想检查收到的结果中是否有特定的key。如果是这种情况，您可以尝试以下方法：

opportunities = cwObj.get_opportunities()

for opportunity in opportunities:
    if 'id' in opportunity:
        temp = opportunity['id']
        opportunity_id = str(temp)
        presales_ticket = cwObj.get_tickets_by_opportunity(opportunity_id)
        presales_engineer = presales_ticket[0]['owner']['name']
    else:
        # What to do if there is no 'id' as key of opportunity

Answer 2

我不确定您到底在寻找什么。但是如果您不需要检查，请输入只需使用

if opportunity['id'] is not None:
   temp = opportunity['id']

Answer 3

您确定cwObj.get_tickets_by_opportunity（）没有返回空列表吗？

opportunities = cwObj.get_opportunities()

for opportunity in opportunities:
    try:
        temp = opportunity['id']
        opportunity_id = str(temp)
        presales_ticket = cwObj.get_tickets_by_opportunity(opportunity_id)
        if presales_ticket:
            if 'owner' in presales_ticket[0]:
                presales_engineer = presales_ticket[0]['owner']['name']
        else:
            # default presales ticket dict
    except KeyError:
        presales_engineer = None

JSON响应返回None时如何处理

3 个答案: