asked    Herman     2018-10-22       python       79 view        1 Answer

[SOLVED] AWS / Python Lambda function checking if a query string is present

Within my lambda function, which takes in event api query strings, I want to check if one is present. The below works if it is:

if event['queryStringParameters']['order'] == 'desc':

I have tried event['queryStringParameters']['order'] != null but if there is no order query string used the lambda function the function breaks causing a 502 response. How do I check if a query string is not used without it breaking?

  1 Answer  

        answered    Madge     2018-10-22      

Always check if the dict contains an key before referencing it.

if 'queryStringParameters' in event and 'order' in event['queryStringParameters']:

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