具有多种功能的AWS Python Lambda

Question

I have an AWS Lambda function in python3.7. The way its set up im running the lambda_handler(event, context) function and passing data to a separate function that calls itself multiple times depending on what is passed into it. How do I then return data from the second function?

import json
import boto3

def lambda_handler(event, context):
    # code to get initial data
    x = second_function(data)
    print(x)
    return x



def second_function(data):
    # code to manipulate data
    if condition:
       print(newData)
       second_function(newData)
    else:
       return allData

I expected this to return allData back through the lambda_handler function, but instead returns null

And logged is

newData
newData
newData
None

I am using the second function to get data based on the last PaginationToken . Is there a better way to get paginated data rather than creating a second recursive function?

Answer 1

One option is to use a boto3 paginator .

Alternatively, you could use a loop rather than a recursive function .

It would be something like:

response = api_call()
<do stuff with response>
while response['NextToken']:
    response=api_call(NextToken=response['NextToken'])
    <do stuff with response>

You can probably avoid having to double-up the <do stuff> bit by improving on the while statement.