add: lambda with dynamodb

template.yaml

@@ -0,0 +1,8 @@
+AWSTemplateFormatVersion : '2010-09-09'
+Transform: AWS::Serverless-2016-10-31
+Resources:
+  HelloNameFunction:
+    Type: AWS::Serverless::Function
+    Properties:
+      Handler: app.lambda_handler
+      Runtime: python3.9

test/lambda_dynamodb_test.py

@@ -0,0 +1,44 @@
+import boto3
+import os
+
+aws_access_key_id = 'YOUR_ACCESS_KEY_ID'
+aws_secret_access_key = 'YOUR_SECRET_ACCESS_KEY'
+region_name = 'YOUR_REGION'
+
+# 創建 DynamoDB client
+dynamodb = boto3.resource(
+    'dynamodb', 
+    aws_access_key_id=aws_access_key_id,
+    aws_secret_access_key=aws_secret_access_key,
+    region_name=region_name
+)
+
+def lambda_handler(event: any, context: any):
+
+    user: str = event["user"]
+    visit_count: int = 0
+
+    # Prepare the DynamoDB client
+    dynamodb = boto3.resource("dynamodb")
+    table_name = "lambda-dynamodb-test"
+    # table_name = os.environ["TABLE_NAME"]
+    table = dynamodb.Table(table_name)
+
+    # Get the visit count from the DynamoDB table
+    response = table.get_item(Key={"user": user})
+    if "Item" in response:
+        visit_count = response["Item"]["visit_count"]
+
+    # Increment the visit count and put the item into DynamoDB table.
+    visit_count += 1
+    table.put_item(Item={"user": user, "visit_count": visit_count})
+
+    message: str = f"Hello {user}! You have visited us {visit_count} times."
+    return {"message": message}
+
+
+if __name__ == "__main__":
+    # os.environ["TABLE_NAME"] = "lambda-dynamodb-test"
+    test_event = {"user": "1chooo"}
+    result = lambda_handler(test_event, None)
+    print(result)