I’m trying to list all the tables in the dynamodb and if the table name == “specific_table_name” then I have to update an attribute to true, other tables’ attribute should be updated to false.

I’m able to update the attribute if I specify tablename directly, but if use a variable name(required for tables other than specific table), it fails.

Below is the lambda function:

import boto3

def lambda_handler(event, context):
# Initialize the DynamoDB client
dynamodb = boto3.client(‘dynamodb’)

# Get a list of all table names
response = dynamodb.list_tables()

# String to search for
# search_string = 'rest1'

# List to store tables containing the search string
matching_tables = []

# Check each table name for the search string
for table_name in response['TableNames']:
    if "rest1" in table_name:
        matching_tables.append(table_name)
        dynamodb = boto3.resource('dynamodb')
        
        if table_name == "rest1_localrest3":
            table = dynamodb.Table('rest1_localrest3')
            response = table.update_item(
                Key = {'PK':'restindividual#restaccountinfo', 'SK': 'restaccountinfo'},
                UpdateExpression = "SET isDefault = :s",
                ExpressionAttributeValues = {':s' : True},
                )                
            
        else:
            print("Aline31 table_name",table_name)
            table = dynamodb.Table(table_name)
            response = table.update_item(
                Key = {'PK':'restindividual#restaccountinfo', 'SK': 'restaccountinfo'},
                UpdateExpression = "SET isDefault = :s",
                ExpressionAttributeValues = {':s' : False},
                )            
            print("Aline35 Error: Exception ", e, " occurred while table name assigning !!!")

        
        

# Return the list of matching table names
return {

    'body': json.dumps('Updated successfully')
}

Error at: table = dynamodb.Table(table_name)
if replace table_name by specific tablename, it works as it is if condition, but to work on other table I have to use variable table_name

Whats wrong with table = dynamodb.Table(table_name)