Python - excel : writing to multiple cells takes time

Question

I\'m using win32com.client to write data to an excel file. This takes too much time (the code below simulates the amount of data I want to update excel with, and it takes ~2 sec

Answer 1

A few suggestions:

ScreenUpdating off, manual calculation

Try the following:

xlsApp.ScreenUpdating = False
xlsApp.Calculation = -4135 # manual
try:
    #
    worksheet = ...
    for i in range(...):
    # 
finally:
    xlsApp.ScreenUpdating = True
    xlsApp.Calculation = -4105 # automatic

Assign several cells at once

Using VBA, you can set a range's value to an array. Setting several values at once might be faster:

' VBA code
ActiveSheet.Range("A1:D1").Value = Array(1, 2, 3, 4)

I have never tried this using Python, I suggest you try something like:

worksheet.Range("A1:D1").Value = [1, 2, 3, 4]

A different approach

Consider using openpyxl or xlwt. Openpyxls lets you create .xlsx files without having Excel installed. Xlwt does the same thing for .xls files.