The Problem (Q-score 16, ranked #32nd of 303 in the Excel VBA archive)
The scenario as originally posted in 2013
In this post there is a Python example to convert from csv to xls.
However, my file has more than 65536 rows so xls does not work. If I name the file xlsx it doesnt make a difference. Is there a Python package to convert to xlsx?
Why this Range / Worksheet targeting trips people up
The question centers on reaching a specific cell, range, or workbook object. In Excel VBA, this is the #1 source of failures after activation events: every property (.Value, .Formula, .Address) behaves differently depending on whether the parent Workbook is explicit or implicit.
The Verified Solution — elite answer (top 10 %%) (+29)
16-line Excel VBA pattern (copy-ready)
Here’s an example using xlsxwriter:
import os
import glob
import csv
from xlsxwriter.workbook import Workbook
for csvfile in glob.glob(os.path.join('.', '*.csv')):
workbook = Workbook(csvfile + '.xlsx')
worksheet = workbook.add_worksheet()
with open(csvfile, 'rb') as f:
reader = csv.reader(f)
for r, row in enumerate(reader):
for c, col in enumerate(row):
worksheet.write(r, c, col)
workbook.close()
FYI, there is also a package called openpyxl, that can read/write Excel 2007 xlsx/xlsm files.
Hope that helps.
When to Use It — classic (2013–2016)
Ranked #32nd in its category — specialized fit
This pattern sits in the 91% tail relative to the top answer. Reach for it when your scenario closely matches the question title; otherwise browse the Excel VBA archive for a higher-consensus alternative.
What changed between 2013 and 2026
The answer is 13 years old. The Excel VBA object model has been stable across Office 2013, 2016, 2019, 2021, 365, and 2024/2026 LTSC, so the pattern still compiles. Changes that might affect you: 64-bit API declarations (use PtrSafe), blocked macros in downloaded files (Mark-of-the-Web), and the shift toward Office Scripts for web-first workflows.