created transactions2.xlsx to store the results of data management fr…

…om transactions.xlsx. on using_pip_openpyxl, made an an exercise on this. need to apply 10% discount on all the values under C column. Made a chart. This is just a practice to familiarize myself with the Python packages available on the Python Package Index. myself with its available functionalities

using_pip_openpyxl.py

@@ -1,4 +1,12 @@
+# Will make an exercise on this. need to apply 10% discount on all the values under C column.
+# Also need to make a chart once done.
+# This is just a practice to familiarize myself with the Python packages available on the Python Package Index.
+# I clearly need to delve much deeper into a specific Python package if I want to familiarize
+# myself with its available functionalities
+
 import openpyxl as xl
+from openpyxl.chart import BarChart, Reference
+
 wb = xl.load_workbook("transactions.xlsx")
 sheet = wb['Sheet1']
 cell = sheet.cell(1, 1)
@@ -13,5 +21,16 @@
 
 print("will reiterate the contents of C2 to C4 cells below:")
 for row in range(2, max_row + 1):
-    cell = sheet.cell(row, 3)
-    print(cell.value)
+    cell_column_c = sheet.cell(row, 3)
+    discounted_price = cell_column_c.value * .90
+    cell_column_d = sheet.cell(row, 4)
+    cell_column_d.value = discounted_price
+
+ref_values = Reference(sheet, min_row=2, max_row=sheet.max_row, min_col=4, max_col=4)
+
+chart = BarChart()
+chart.add_data(ref_values)
+sheet.add_chart(chart, 'e2')
+
+wb.save('transactions2.xlsx')
+print("Saved on transactions2.xlsx")