Python修改现有.xlsx文件的数据

Question

我在python中有一些代码，它使用openpyxl创建了一个.xlsx文件。

然而，当我试图修改文件时，新数据会注册到文件中，但以前的数据不见了。我听说过使用deepcopy或（.copy.copy）复制文件的数据，但如何将复制的数据加上我当前的编辑粘贴到.xlsx文件中？

（*这里缺少一些代码，因为它是一个带有GUI的程序，代码太长了）

##############creating######################
try:
    wb_ID = load_workbook('list.xlsx') 
    ws_ID = wb_ID.active
    pass
except EnvironmentError as e:      # OSError or IOError... As FileNotFoundError only exist in Python 3.x version
    print(os.strerror(e.errno)) #use operating system error to define FileNotFoundErrorError
    from openpyxl import Workbook #import Workbook function to create new xlsx (excel) file
    wb_ID = Workbook()
    ws_ID = wb_ID.active
    ws_ID['A1'] = "IC"
    ws_ID.merge_cells('B1:E1')
    ws_ID['B1'] = "Name"
    ws_ID.merge_cells('F1:K1')
    ws_ID['L1'] = "Email"
    ws_ID['M1'] = "Height"
    ws_ID['N1'] = "Gender"
    ws_ID['K1'] = "Bloodtype"
    ws_ID.merge_cells('O1:Q1')
    ws_ID['O1'] = "Default Consultation Day"
    ws_ID.merge_cells('R1:T1')
    ws_ID['R1'] = "Latest Appoinment"
    wb_ID.save("list.xlsx")
    pass
############editing#########################
wb = load_workbook(filename='list.xlsx')
ws = wb.active
last_row = 1
while True:
    last_row += 1
    cellchecker =ws['A'+str(last_row)].value #get the value of the cell
    print(cellchecker)
    print last_row
    if cellchecker is None: #check if cell is empty-->then this row number is the new row
        wb.save('list.xlsx')
        break
    else:
        continue
print(str(last_row)) #convert to string var before passing the var for worksheet function
from openpyxl import Workbook
wb = Workbook() 
ws = wb.active
ws['A'+str(last_row)] = (str(entry_IC.get().strip(' ')))
ws.merge_cells('B'+str(last_row)+':E'+str(last_row))
ws['B'+str(last_row)] = (str(entry_Name.get()))
ws.merge_cells('F'+str(last_row)+':K'+str(last_row))
ws['F'+str(last_row)] = (str(entry_email.get().strip(' ')))
ws['L'+str(last_row)] = (str(entry_Height.get().strip(' ')))
ws['M'+str(last_row)] = gender_selected
ws['N'+str(last_row)] = bloodtype_selected
ws.merge_cells('O'+str(last_row)+':Q'+str(last_row))
ws['O'+str(last_row)] = str(default_selected_day)
ws.merge_cells('R'+str(last_row)+':T'+str(last_row))
today = datetime.date.today() #as u might wonder why i redeclare this var since it already exist, but this is local var for this function only
ws['T'+str(last_row)] = (str(today))
wb.save('list.xlsx')

请注意，编辑部分将覆盖openpyxl文档中警告的现有数据。我真的找不到修改现有.xlsx文件的方法。请帮帮我，我被困在这里了。

Answer 1

我已经多次遇到这个问题，但一直无法使用纯python解决它；但是，您可以使用以下代码从Python脚本中调用VBA宏，该宏可用于修改现有的excel文件。

这让我能够想出创造性的方法来简化工作，这样我就不必为了更新excel文件而打开excel文件，即使数据处理或收集需要python。

# run excel macro from python
import win32com.client
fn = '//path/filename.xlsm'
xl=win32com.client.Dispatch("Excel.Application")
xl.Application.Visible = True
xl.Workbooks.Open(Filename = fn,ReadOnly = 1)
xl.Application.Run("macroname")
xl=0