added tutorial examples and my data workthrough examplesin unsup_v1.py

itertools.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Tue Mar 22 17:12:12 2022
+
+@author: tanu
+"""
+# itertools
+# https://datagy.io/python-combinations-of-a-list/
+from itertools import combinations
+sample_list = ['a', 'b', 'c']
+list_combinations = list()
+for n in range(len(sample_list) + 1):
+    list_combinations += list(combinations(sample_list, n))
+print(list_combinations)
+
+
+#%%
+col_list = num_df_wtgt.columns
+col_list = [1:4]
+len(col_list)
+
+col_L_combinations = list()
+for n in range(1, len(col_list) + 1):
+    col_L_combinations += list(combinations(col_list, n))
+print(col_L_combinations)
+print(len(col_L_combinations))