lambdaInvoker.py

import json
import boto3

client = boto3.client('lambda')

def lambda_handler(event, context):
	
  inputForInvoker = {'Id': '1', 'Price': 100 }

	response = client.invoke(
		FunctionName='YOUR LAMBDA ARN',
		InvocationType='RequestResponse', # Or Event
		Payload=json.dumps(inputForInvoker)
		)

	responseJson = json.load(response['Payload'])

	print(responseJson)

lambdaInvokerPolicy.json

# AWSLambdaBasicExecutionPolicy

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "logs:CreateLogGroup",
                "logs:CreateLogStream",
                "logs:PutLogEvents"
            ],
            "Resource": "*"
        }
    ]
}

# InvokeOtherLambdaPolicy

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "VisualEditor0",
            "Effect": "Allow",
            "Action": [
                "lambda:InvokeFunction",
                "lambda:InvokeAsync"
            ],
            "Resource": "arn:aws:lambda:*:*:function:*"
        }
    ]
}