学习python笔记：7，操作excel表格，生成柱状图，

注意：

注意xlsx的格式，wps一定另存为xlsx才可以，不然就出错。

操作表格

1，在终端里面安装openpyxl

        pip install openpyxl

import openpyxl as xl
from openpyxl.chart import BarChart,Reference

#注意xlsx的格式，wps另存为xlsx才可以，奇怪
wb = xl.load_workbook('transaction1.xlsx')

sheet = wb['Sheet1']
cell = sheet['A1']
cell = sheet.cell(1,1)

print(cell.value)
print(sheet.max_row)

for row in range(2, sheet.max_row+1):
    cell = sheet.cell(row,3)
    corrected_price = cell.value *0.9
    corrected_price_cell = sheet.cell(row,4)
    corrected_price_cell.value = corrected_price

输出柱状图

#输出柱状图 chart_values = Reference(sheet, min_row=2, max_row=sheet.max_row, min_col=4, max_col=4) chart = BarChart() chart.add_data(chart_values) sheet.add_chart(chart,'E2')

自动化处理：

#改为函数，可以做自动化处理，只要传入文件名即可。

import openpyxl as xl
from openpyxl.chart import BarChart,Reference

def process_workbook(filename):

    wb = xl.load_workbook(filename)
    sheet = wb['Sheet1']

    for row in range(2, sheet.max_row+1):
        cell = sheet.cell(row,3)
        corrected_price = cell.value *0.9
        corrected_price_cell = sheet.cell(row,4)
        corrected_price_cell.value = corrected_price

    chart_values = Reference(sheet,
              min_row=2,
              max_row=sheet.max_row,
              min_col=4,
              max_col=4)

    chart = BarChart()
    chart.add_data(chart_values)
    sheet.add_chart(chart,'E2')
    wb.save(filename)