S3Path or PureS3Path returns NoSuchKeyExists on open('rb') handle intermittently about smart_open HOT 5 CLOSED

from s3path import S3Path, PureS3Path, register_configuration_parameter

register_configuration_parameter(
    S3Path(f"/{bucket_name }"),
    parameters={
        'ServerSideEncryption': 'AES256'
    })

def s3_get_path_obj(did, filename='', pure=False):
    bname = f"/{bucket_name}" 
    """Returns either PureS3Path or S3Path object.
    
    Parameters:
            did: Integer of NPI for practice
            optional:
            filename: String of filename if not directory.
            pure: Boolean - Whether to use S3PurePath or S3Path"""
    if pure:
        s3obj = PureS3Path(bname,'practice',did,filename)
    else:
        s3obj = S3Path(bname,'practice',did,filename)
    return s3obj

Debugging middleware caught exception in streamed response at a point where response headers were already sent.
Traceback (most recent call last):
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\smart_open\s3.py", line 330, in _get
    return client.get_object(Bucket=bucket, Key=key, Range=range_string)
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\botocore\client.py", line 391, in _api_call
    return self._make_api_call(operation_name, kwargs)
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\botocore\client.py", line 719, in _make_api_call
    raise error_class(parsed_response, operation_name)
botocore.errorfactory.NoSuchKey: An error occurred (NoSuchKey) when calling the GetObject operation: The specified key does not exist.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\werkzeug\wsgi.py", line 538, in __next__
    data = self.file.read(self.buffer_size)
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\smart_open\s3.py", line 610, in read
    self._fill_buffer(size)
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\smart_open\s3.py", line 713, in _fill_buffer
    bytes_read = self._buffer.fill(self._raw_reader)
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\smart_open\bytebuffer.py", line 152, in fill
    new_bytes = source.read(size)
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\smart_open\s3.py", line 473, in read
    self._open_body()
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\smart_open\s3.py", line 438, in _open_body
    response = _get(
  File "C:\Users\adame\.virtualenvs\SET-7TiNCuEs\Lib\site-packages\smart_open\s3.py", line 338, in _get
    raise wrapped_error from error
OSError: unable to access bucket: 'smd-set-repo' key: 'practice/1619049558/1619049558.pdf' version: None error: An error occurred (NoSuchKey) when calling the GetObject operation: The specified key does not exist.

pdf_s3file = datasheet_3.generate_pdf(did)

customer = Customer(did)
try:
    with pdf_s3file.open('rb') as f:
        return send_file(f,
                        attachment_filename=pdf_s3file.name,mimetype='application/pdf')
except Exception as e:
    error_msg = f"Error generating datasheet 3 for {pdf_s3file.name}: {e}"
    flash(error_msg)
    return _render_dashboard_(customer)