Writing into existing excel file using python

Question

I have a .xlsx file in which multiple worksheets are there (with some content). I want to write some data into specific sheets say sheet1 and sheet5. Right now I am doing it using xlrd, xlwt, and xlutils copy() function. But is there any way to do it by opening the file in append mode and adding the data and save it (Like as we do it for the text/CSV files)?

Here is my code:

rb = open_workbook("C:\text.xlsx",formatting_info='True')
wb = copy(rb)
Sheet1 = wb.get_sheet(8)
Sheet2 = wb.get_sheet(7)
Sheet1.write(0,8,'Obtained_Value')
Sheet2.write(0,8,'Obtained_Value')
value1 = [1,2,3,4]  
value2 = [5,6,7,8]
for i in range(len(value1)):
 Sheet1.write(i+1,8,value1[i])
for j in range(len(value2)):
 Sheet2.write(j+1,8,value2[j])
wb.save("C:\text.xlsx")

Answer 1

For manipulating existing excel files you should use openpyxl. Other common libraries like the ones you are using dont support manipulating existing excel files. A workaround is to

• save your output file as a different name - text_temp.xlsx
• delete your original file - text.xlsx
• rename your output file - text_temp.xlsx to text.xlsx

Answer 2

You can do it using the openpyxl module or using the xlwings module

1. Using openpyxl

   from openpyxl import workbook #pip install openpyxl
   from openpyxl import load_workbook
   
   wb = load_workbook("C:\text.xlsx")
   sheets = wb.sheetnames
   Sheet1 = wb[sheets[8]]
   Sheet2 = wb[sheets[7]]
   #Then update as you want it
   Sheet1 .cell(row = 2, column = 4).value = 5 #This will change the cell(2,4) to 4
   wb.save("HERE PUT THE NEW EXCEL PATH") 
   

   the text.xlsx file will be used as a template, all the values from text.xlsx file together with the updated values will be saved in the new file

2. Using xlwings

    import xlwings 
    wb = xlwings.Book("C:\text.xlsx")  
    Sheet1 = wb.sheets[8]
    Sheet2 = wb.sheets[7]
    #Then update as you want it
    Sheet1.range(2, 4).value = 4 #This will change the cell(2,4) to 4
    wb.save()
    wb.close()
   

   Here the file will be updated in the text.xlsx file but if you want to have a copy of the file you can use the code below

   shutil.copy("C:\text.xlsx", "C:\newFile.xlsx") #copies text.xslx file to newFile.xslx
   

   and use

   wb = xlwings.Book("C:\newFile.xlsx") instead of wb = xlwings.Book("C:\text.xlsx")
   

   As a user of both modules I prefer the second one over the first one.