Code execute raise TypeError: 'PandasConnector' object is not subscriptable, looks PandasConnector not be well linked to a DataFrame.

[Xinyue Chen]

System Info

pandasai==2.0.21
pytho==3.9.19
os==ubuntu

🐛 Describe the bug

The bug is PandasConnector isn't well-linked to a Pandas Dataframe, as error message below, running generated code to manipulate df raise error.

The user asked the following question:
QUERY
德州仪器中工作温度相同的芯片有哪些

You generated this python code:
import pandas as pd

Assuming the DataFrame provided is already given to us as df.
df = dfs[0]

Filter the DataFrame for Texas Instruments
texas_instruments_df = df[df['制造商'] == 'Texas Instruments']

Ensure that we only consider rows where temperature values are not NaN
texas_instruments_df = texas_instruments_df.dropna(subset=['最小工作温度', '最大工作温度'])

Group by unique combinations of minimum and maximum working temperature
grouped_by_temp_df = texas_instruments_df.groupby(['最小工作温度', '最大工作温度'])

Extract groups with more than one entry (the same working temperature range)
common_temp_chips = {}
for (min_temp, max_temp), group in grouped_by_temp_df:
if len(group) > 1:
common_temp_chips[f"{min_temp}C to {max_temp}C"] = group['零件型号'].tolist()

Convert dictionary to DataFrame for better readability
common_temp_chips_df = pd.DataFrame([(k, v) for k, v in common_temp_chips.items()], columns=['Temperature Range', 'Chip Models'])

Showing the result
print(common_temp_chips_df)

It fails with the following error:
Traceback (most recent call last):
File "/root/anaconda3/envs/chatdb/lib/python3.9/site-packages/pandasai/pipelines/chat/code_execution.py", line 64, in execute
result = code_manager.execute_code(code_to_run, code_context)
File "/root/anaconda3/envs/chatdb/lib/python3.9/site-packages/pandasai/helpers/code_manager.py", line 182, in execute_code
code_to_run = self._clean_code(code, context)
File "/root/anaconda3/envs/chatdb/lib/python3.9/site-packages/pandasai/helpers/code_manager.py", line 562, in _clean_code
self._extract_fix_dataframe_redeclarations(node, clean_code_lines)
File "/root/anaconda3/envs/chatdb/lib/python3.9/site-packages/pandasai/helpers/code_manager.py", line 467, in _extract_fix_dataframe_redeclarations
exec(code, env)
File "", line 3, in
TypeError: 'PandasConnector' object is not subscriptable

[Xinyue Chen]

It's ok, in 2.0.26, this issue is fixed.