The NoCredentialsError is an error encountered when using the Boto3 library to interface with AWS(Amazon Web Services). Specifically, this error is encountered when your AWS credentials are missing, invalid, or not recognized by your Python script.
Attempting to create a Connection
A NoCredentialsError is encountered while creating a connection to AWS. Let’s have a look at a piece of code which connects to a Boto3 client.
python
import boto3
client = boto3.client('ce',region_name='ap-southeast-1')
response = client.get_cost_and_usage(
TimePeriod={
'Start': '2023-02-01',
'End': '2023-03-01'
},
Granularity='MONTHLY',
Metrics=[
'AmortizedCost',
]
)
An Issue Is Found
Let's run the above script and there is an issue with the credentials, the console will printout the following error:
plaintext
Traceback (most recent call last):
File "F:\Python\adplaydsp\venv\lib\site-packages\IPython\core\interactiveshell.py", line 3369, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-4-9aea1c404679>", line 1, in <cell line: 1>
response = client.get_cost_and_usage(
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\client.py", line 530, in _api_call
return self._make_api_call(operation_name, kwargs)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\client.py", line 943, in _make_api_call
http, parsed_response = self._make_request(
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\client.py", line 966, in _make_request
return self._endpoint.make_request(operation_model, request_dict)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\endpoint.py", line 119, in make_request
return self._send_request(request_dict, operation_model)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\endpoint.py", line 198, in _send_request
request = self.create_request(request_dict, operation_model)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\endpoint.py", line 134, in create_request
self._event_emitter.emit(
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\hooks.py", line 412, in emit
return self._emitter.emit(aliased_event_name, **kwargs)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\hooks.py", line 256, in emit
return self._emit(event_name, kwargs)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\hooks.py", line 239, in _emit
response = handler(**kwargs)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\signers.py", line 105, in handler
return self.sign(operation_name, request)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\signers.py", line 189, in sign
auth.add_auth(request)
File "F:\Python\adplaydsp\venv\lib\site-packages\botocore\auth.py", line 418, in add_auth
raise NoCredentialsError()
botocore.exceptions.NoCredentialsError: Unable to locate credentials