Fix: Update imports after reorganization

- Updated __init__.py exports
- Fixed FormulaLinearModel.py formatting

Author: miranov25

UTILS/dfextensions/__init__.py

@@ -1,14 +1,27 @@
-# __init__.py
+"""
+dfextensions - DataFrame extensions and utilities.
 
+Main packages:
+- AliasDataFrame: Lazy-evaluated DataFrame with compression support
+- groupby_regression: Grouped regression utilities
+- quantile_fit_nd: N-dimensional quantile fitting
+- dataframe_utils: Plotting and statistics utilities
+- formula_utils: Formula-based modeling and code export
+"""
 
-from .FormulaLinearModel import FormulaLinearModel
-from .DataFrameUtils import *  # if it provides general helper functions
-from .groupby_regression import *  # or other relevant functions
+# Main packages
 from .AliasDataFrame import AliasDataFrame, CompressionState
+from .groupby_regression import *  # Includes GroupByRegressor
+
+# Utilities (moved to subdirectories)
+from .dataframe_utils import *
+from .formula_utils import FormulaLinearModel
 
 __all__ = [
     "AliasDataFrame",
+    "CompressionState",
     "FormulaLinearModel",
-    "GroupByRegressor"
+    "GroupByRegressor",  # from groupby_regression
 ]
 
+__version__ = '1.1.0'

UTILS/dfextensions/formula_utils/FormulaLinearModel.py

@@ -1,6 +1,5 @@
 
 """ FormulaLinearModel.py
-import sys,os; sys.path.insert(1, os.environ[f"O2DPG"]+"/UTILS/dfextensions");
 from  FormulaLinearModel import *
 Utility helpers extension for FormulaLinearModel.py
 """