Writing into existing excel file using python

问题

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")

Thanks

回答1:

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

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

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.

回答2:

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

来源：https://stackoverflow.com/questions/30724364/writing-into-existing-excel-file-using-python

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python

excel

writing