Python-如何防止for循环覆盖相同的Excel工作表

Question

Recently I been working on my small project that is auto generating work hours spreadsheets for me. It's been working well for me only but when I want to generate multiple worksheets (later on refereed as sheet) and or generate multiple spreadsheets It overwrites the old one.

For opening, editing and generating the spreadsheet I'm using openpyxl lib.

I have tried moving save part and generate part outside of the loops and etc. but none of that helped me.

Question is how do I prevent for loop from overwriting the file and instead of that generating the new one ?

Here's the main piece of that software down below.

cols = [2, 3, 4, 12]
row = 9
hrs = 0
nhrs = 0


for worker in workers:
    sheet.title = ('{} {}'.format(worker.name, worker.surename))
    for day, hday in itertools.zip_longest(days, holidays):
            if day.weekday() <= 4 and day not in holydays:
                sheet.cell(row=row, column=cols[0]).value = '08:00'
                sheet.cell(row=row, column=cols[1]).value = '16:00'
                sheet.cell(row=row, column=cols[2]).value = '8 h'
                hrs += 8
                row += 1
            elif day.weekday() > 4 and day not in holidays:
                sheet.cell(column=cols[0], row=row).value = ''
                row += 1
            elif day in holidays:
                sheet.cell(column=cols[3], row=row).value = '8 h'
                nhrs += 8
                row += 1

    sheet.cell(column=cols[2], row=40).value = str(hrs) + ' h'
    sheet.cell(column=cols[3], row=40).value = str(nhrs) + ' h'

workbook.save('SPREADSHEET_{}.xlsx'.format(native_month))
print('Done')

Thanks in advance !

---

Edit from comment:

# native_month for the workbook name is provided by this function applied to a 1-12 
def month_name_native(month): 
    months = ["Unknown", "Januar", "Februar", "Mart", "April", "Maj", "Jun", 
              "Jul", "August", "Septembar", "Oktobar", "Decembar" ] 
    return months[month].upper() 

Answer 1

If I understand you correctly, you want for each worker a new spreadsheet, right?

What you are currenctly doing is that you use the same sheet object over and over again, thus it gets overwritten. You have to create a new sheet inside the for loop for each worker. This should do:

cols = [2, 3, 4, 12]
row = 9
hrs = 0
nhrs = 0
workbook = Workbook()  # assuming you imported openpyxl with *, else adjust

for worker in workers:
    sheet = workbook.create_sheet('{} {}'.format(worker.name, worker.surename)) 
    for day, hday in itertools.zip_longest(days, holidays):
           if day.weekday() <= 4 and day not in holydays:
               sheet.cell(row=row, column=cols[0]).value = '08:00'
               sheet.cell(row=row, column=cols[1]).value = '16:00'
               sheet.cell(row=row, column=cols[2]).value = '8 h'
               hrs += 8
               row += 1
           elif day.weekday() > 4 and day not in holidays:
               sheet.cell(column=cols[0], row=row).value = ''
               row += 1
           elif day in holidays:
               sheet.cell(column=cols[3], row=row).value = '8 h'
               nhrs += 8
               row += 1

    sheet.cell(column=cols[2], row=40).value = str(hrs) + ' h'
    sheet.cell(column=cols[3], row=40).value = str(nhrs) + ' h'

workbook.save('SPREADSHEET_{}.xlsx'.format(native_month))
print('Done')