refs #281, Pandas partially working

More cleanup and experimentation.  There is an issue with saving where sometimes the dict gets an extra key "0" and the update query fails.  Also, even at times that the query goes through, the DataSet does not seem to update immediately to show the difference

Author: PySimpleSQL

examples/SQLite_examples/Journal.db

@@ -64,7 +64,7 @@
 import threading  # threaded popup
 from datetime import date, datetime
 from time import sleep, time  # threaded popup
-from typing import Any, Callable, Dict, List, Optional, Tuple, Type, TypedDict, Union
+from typing import Callable, Dict, List, Optional, Tuple, Type, TypedDict, Union
 
 import pandas as pd
 import PySimpleGUI as sg
@@ -5868,7 +5868,7 @@ def __init__(
         :column_info: a `ColumnInfo` object can be supplied so that column information
             can be accessed
         """
-        super().__init__(rows)
+        super().__init__(rows)  # initialize the DataFrame with the row values
         self.lastrowid = lastrowid
         self.exception = exception
         self.column_info = column_info
@@ -5912,7 +5912,7 @@ def insert(self, row: dict, idx: int = None, virtual: bool = False) -> None:
         """
         row_series = pd.Series(row)
         if idx is None:
-            idx = len(self)
+            idx = len(self.index)
         idx_label = self.index.max() + 1 if len(self) > 0 else 0
         self.loc[idx_label] = row_series
         self.attrs["original_index"] = self.attrs["original_index"].insert(