class_docstr: Unit tests for the SmartDatlake class
code: def test_retry_on_error_with_single_df(
      self,
      smart_datalake: SmartDatalake,
      smart_dataframe: SmartDataframe,
  ):
      code = """result = 'Hello World'"""
  
      smart_dataframe._get_sample_head = Mock(
          return_value=pd.DataFrame(
              {
                  "country": ["China", "Japan", "Spain"],
                  "gdp": [654881226, 9009692259, 8446903488],
                  "happiness_index": [6.66, 7.16, 6.38],
              }
          )
      )
  
      smart_datalake._retry_run_code(
          code=code,
          e=Exception("Test error"),
      )
  
      last_prompt = smart_datalake.last_prompt
      if sys.platform.startswith("win"):
          last_prompt = last_prompt.replace("\r\n", "\n")
  
      assert (
          last_prompt
          == """<dataframe>
  dfs[0]:10x3
  country,gdp,happiness_index
  China,654881226,6.66
  Japan,9009692259,7.16
  Spain,8446903488,6.38
  </dataframe>
  
  The user asked the following question:
  
  
  You generated this python code:
  result = 'Hello World'
  
  It fails with the following error:
  Test error
  
  Fix the python code above and return the new python code:"""  # noqa: E501
      )
  
imports: import os
  import sys
  from typing import Optional
  from unittest.mock import Mock, patch
  import pandas
  import pytest
  from pandasai import SmartDataframe, SmartDatalake
  from pandasai.connectors.base import SQLConnectorConfig
  from pandasai.connectors.sql import PostgreSQLConnector, SQLConnector
  from pandasai.helpers.code_manager import CodeManager
  from pandasai.llm.fake import FakeLLM
  from pandasai.constants import DEFAULT_FILE_PERMISSIONS
  from langchain import OpenAI
label_desc: Use image node_id 11 for calling the TestSmartDatalake obj's underlying member method code with example usage: obj.test_retry_on_error_with_single_df(smart_datalake, smart_dataframe) without return types