jacob jacob - 2 months ago 32
Python Question

AWS DynamoDB Python Connection Error

Unable to run sample code on AWS Dynamodb.

I am trying to run the AWS sample python code that they provide on there website. Here is my python file:

from __future__ import print_function # Python 2/3 compatibility
import boto3

dynamodb = boto3.resource('dynamodb', region_name='us-west-2', endpoint_url="http://localhost:8000")


table = dynamodb.create_table(
TableName='Movies',
KeySchema=[
{
'AttributeName': 'year',
'KeyType': 'HASH' #Partition key
},
{
'AttributeName': 'title',
'KeyType': 'RANGE' #Sort key
}
],
AttributeDefinitions=[
{
'AttributeName': 'year',
'AttributeType': 'N'
},
{
'AttributeName': 'title',
'AttributeType': 'S'
},

],
ProvisionedThroughput={
'ReadCapacityUnits': 10,
'WriteCapacityUnits': 10
}
)

print("Table status:", table.table_status)


I then I run the python file in terminal and I get the following error:

File "MoviesCreateTable.py", line 32, in <module>
'WriteCapacityUnits': 10
File "/home/name/.local/lib/python2.7/site-packages/boto3/resources/factory.py", line 520, in do_action
response = action(self, *args, **kwargs)
File "/home/name/.local/lib/python2.7/site-packages/boto3/resources/action.py", line 83, in __call__
response = getattr(parent.meta.client, operation_name)(**params)
File "/home/name/.local/lib/python2.7/site-packages/botocore/client.py", line 159, in _api_call
return self._make_api_call(operation_name, kwargs)
File "/home/name/.local/lib/python2.7/site-packages/botocore/client.py", line 483, in _make_api_call
operation_model, request_dict)
File "/home/name/.local/lib/python2.7/site-packages/botocore/endpoint.py", line 141, in make_request
return self._send_request(request_dict, operation_model)
File "/home/name/.local/lib/python2.7/site-packages/botocore/endpoint.py", line 170, in _send_request
success_response, exception):
File "/home/name/.local/lib/python2.7/site-packages/botocore/endpoint.py", line 249, in _needs_retry
caught_exception=caught_exception, request_dict=request_dict)
File "/home/name/.local/lib/python2.7/site-packages/botocore/hooks.py", line 227, in emit
return self._emit(event_name, kwargs)
File "/home/name/.local/lib/python2.7/site-packages/botocore/hooks.py", line 210, in _emit
response = handler(**kwargs)
File "/home/name/.local/lib/python2.7/site-packages/botocore/retryhandler.py", line 183, in __call__
if self._checker(attempts, response, caught_exception):
File "/home/name/.local/lib/python2.7/site-packages/botocore/retryhandler.py", line 251, in __call__
caught_exception)
File "/home/name/.local/lib/python2.7/site-packages/botocore/retryhandler.py", line 277, in _should_retry
return self._checker(attempt_number, response, caught_exception)
File "/home/name/.local/lib/python2.7/site-packages/botocore/retryhandler.py", line 317, in __call__
caught_exception)
File "/home/name/.local/lib/python2.7/site-packages/botocore/retryhandler.py", line 223, in __call__
attempt_number, caught_exception)
File "/home/name/.local/lib/python2.7/site-packages/botocore/retryhandler.py", line 359, in _check_caught_exception
raise caught_exception
botocore.vendored.requests.exceptions.ConnectionError: ('Connection aborted.', error(111, 'Connection refused'))

Answer

This happens when Dynamodb isn't running. Check localhost:8000/shell to verify it's running.

Ensure all the prerequisites given in docs are satisfied.

Before you begin this tutorial, you need to do the following:

  • Download and run DynamoDB on your computer. For more information, see Download and Run DynamoDB.
  • Sign up for Amazon Web Services and create access keys. You need these credentials to use AWS SDKs. To create an AWS account, go to http://aws.amazon.com/, choose Create an AWS Account, and then follow the online instructions.
  • Create an AWS credentials file. For more information, see Configuration in the Boto 3 documentation.
  • Install Python 2.6 or later. For more information, see https://www.python.org/downloads.