#!/usr/bin/env python

import os,sys
from openpyxl import Workbook, load_workbook
from openpyxl.chart import BarChart, Reference
import openpyxl
from pprint import pprint

# Load the 'sales.xlsx' file and modify the sheet
wb_sales = load_workbook('sales.xlsx')
sheet_sales = wb_sales["Sheet1"]
last_row = sheet_sales.max_row
num_cols = sheet_sales.max_column

# Calculate the sum of a range of cells
sheet_sales['B14'].value = "=SUM(B2:B13)"

# Adjust the row height and column width
sheet_sales.row_dimensions[1].height = 50
sheet_sales.column_dimensions["A"].width = 20

# Set the font size and color of a cell
sheet_sales['A1'].font = openpyxl.styles.Font(size = 20, color='FF0000')

# Freeze the top row
sheet_sales.freeze_panes = 'A2'

# Create a bar chart
chart = BarChart()
chart.title = "12-Month Sales"
chart.x_axis.title = "Month"
chart.y_axis.title = "Sales"

# Define the categories and data for the chart
categories = Reference(sheet_sales, min_col=1, max_col=1, min_row=2, max_row=13)
data = Reference(sheet_sales, min_col=2, max_col=2, min_row=1, max_row=13)
chart.add_data(data, titles_from_data=True)
chart.set_categories(categories)

# Add the chart to the sheet
sheet_sales.add_chart(chart, "D2")

# Save the modified workbook to a new file
wb_sales.save('new_sales.xlsx')

print("part, done")