python通过openpyxl操作excel容易出现的两个问题

个人最近使用openpyxl操作excel,碰到的两个费时问题总结:

1. PermissionError: [Errno 13] Permission denied: 'test.xlsx'

   此问题如果确定了没动过权限,就可能是因为打开了此文件没有关闭(之前一直以为是权限问题,查了半天文件的权限,结果发现是打开检查结果没关...)

2. 给单元格赋值了,并save()了,打开表格却没有数据
   
   想打开excel文件根据第一列得到数据后输出到第二三列并保存回此excel文件,错误的代码:

def start_excel():
    excel_name = 'test.xlsx'
    wb = openpyxl.load_workbook(excel_name)
    ws = openpyxl.load_workbook(excel_name).active
    for r in range(2, ws.max_row + 1):
        if ws.cell(r, 1).value:
            value1 = ws.cell(r, 1).value
            ws.cell(r, 2).value = value1 + '2'
            ws.cell(r, 3).value = value1 + '3'
    wb.save(excel_name)
    print('finish')

原因在于:

wb = openpyxl.load_workbook(excel_name)
ws = openpyxl.load_workbook(excel_name).active

应该为:

wb = openpyxl.load_workbook(excel_name)
ws = wb.active

不然最后的 wb.save(excel_name),保存的并不是改好的excel(第一次使用贪方便复制粘贴着写引起的错误,应该不会有人也犯吧...)

附上正确的代码:

def start_excel():
    excel_name = 'test.xlsx'
    wb = openpyxl.load_workbook(excel_name)
    ws = wb.active
    for r in range(2, ws.max_row + 1):
        if ws.cell(r, 1).value:
            value1 = ws.cell(r, 1).value
            ws.cell(r, 2).value = value1 + '2'
            ws.cell(r, 3).value = value1 + '3'
    wb.save(excel_name)
    print('finish')