How to save an Excel worksheet as CSV

The most basic examples using the two libraries described line by line:

1. Open the xls workbook
2. Reference the first spreadsheet
3. Open in binary write the target csv file
4. Create the default csv writer object
5. Loop over all the rows of the first spreadsheet
6. Dump the rows into the csv

---

import xlrd
import csv

with xlrd.open_workbook('a_file.xls') as wb:
    sh = wb.sheet_by_index(0)  # or wb.sheet_by_name('name_of_the_sheet_here')
    with open('a_file.csv', 'wb') as f:   # open('a_file.csv', 'w', newline="") for python 3
        c = csv.writer(f)
        for r in range(sh.nrows):
            c.writerow(sh.row_values(r))

---

import openpyxl
import csv

wb = openpyxl.load_workbook('test.xlsx')
sh = wb.active
with open('test.csv', 'wb') as f:  # open('test.csv', 'w', newline="") for python 3
    c = csv.writer(f)
    for r in sh.rows:
        c.writerow([cell.value for cell in r])

Using pandas will be a bit shorter:

import pandas as pd

df = pd.read_excel('my_file', sheetname='my_sheet_name')  # sheetname is optional
df.to_csv('output_file_name', index=False)  # index=False prevents pandas to write row index

# oneliner
pd.read_excel('my_file', sheetname='my_sheet_name').to_csv('output_file_name', index=False)