Lambda Function working, but cannot work with API Gateway - amazon-web-services

Question

I have a working Lambda function when I test it using a test event:
{
"num1_in": 51.5,
"num2_in": -0.097
}
import json
import Function_and_Data_List
#Parse out query string parameters
def lambda_handler(event, context):
num1_in = event['num1_in']
num2_in = event['num2_in']
coord = {'num1': num1_in, 'num2': num2_in}
output = func1(Function_and_Data_List.listdata, coord)
return {
"Output": output
}
However, when I use API gateway to create a REST API I keep getting errors. My method for the REST API are:
1.) Build REST API
2.) Actions -> Create Resource
3.) Actions -> Create Method -> GET
4.) Integration type is Lambda Function, Use Lambda Proxy Integration
5.) Deploy
What am I missing for getting this API to work?

Answer 1

If you use lambda proxy integration, your playload will be in the body. You seem also having incorrect return format.
Therefore, I would recommend trying out the following version of your code:
import json
import Function_and_Data_List
#Parse out query string parameters
def lambda_handler(event, context):
print(event)
body = json.loads(event['body'])
num1_in = body['num1_in']
num2_in = body['num2_in']
coord = {'num1': num1_in, 'num2': num2_in}
output = func1(Function_and_Data_List.listdata, coord)
return {
"statusCode": 200,
"body": json.dumps(output)
}
In the above I also added print(event) so that in the CloudWatch Logs you can inspect the event object which should help debug the issue.