Appending rows in excel xlswriter

Question

I have created an xls file in which I write some user inputs into the cells. So far so good, the program works; it writes the first line. But when I run again the program instead of appending the rows it writes on top of the first one. I'm trying to understand how to make it append a new row into the excel sheet save it and close it etc

import xlsxwriter

workbook = xlsxwriter.Workbook("test.xlsx",)
worksheet = workbook.add_worksheet()

row = 0
col = 0

worksheet.write(row, col,     'odhgos')
worksheet.write(row, col + 1, 'e/p')
worksheet.write(row, col + 2, 'dromologio')
worksheet.write(row, col + 3, 'ora')


row += 1
worksheet.write_string(row, col,     odigosou)
worksheet.write_string(row, col + 1, dromou)
worksheet.write_string(row, col + 2, dromologio)
worksheet.write_string(row, col + 3, ora)

workbook.close()

With this code I created I'm able to write in the file but how do I make it to append a row in the existing sheet. All tutorials I watched, all instructions I researched, just don't work; I'm doing something wrong obviously but I'm not able to spot it.

Solution 1

Question: ... how do I make it to append a row in the existing sheet

Solution using openpyxl, for instance:

from openpyxl import load_workbook

new_row_data = [
    ['odhgos', 'e/p', 'dromologio', 'ora'],
    ['odigosou', 'dromou', 'dromologio', 'ora']]

wb = load_workbook("test/test.xlsx")
# Select First Worksheet
ws = wb.worksheets[0]

# Append 2 new Rows - Columns A - D
for row_data in new_row_data:
    # Append Row Values
    ws.append(row_data)

wb.save("test/test.xlsx")

Tested with Python: 3.4.2 - openpyxl: 2.4.1 - LibreOffice: 4.3.3.2

Solution 2

Another solution which avoids FileNotFound errors by creating the file if it doesn't exist:

from openpyxl import Workbook
from openpyxl import load_workbook

filename = "myfile.xlsx"
new_row = ['1', '2', '3']

# Confirm file exists. 
# If not, create it, add headers, then append new data
try:
    wb = load_workbook(filename)
    ws = wb.worksheets[0]  # select first worksheet
except FileNotFoundError:
    headers_row = ['Header 1', 'Header 2', 'Header 3']
    wb = Workbook()
    ws = wb.active
    ws.append(headers_row)

ws.append(new_row)
wb.save(filename)

# Note: if you're adding values from a list, you could instead use:
# new_row = ""
# new_row += [val for val in list]
# Similarly, for adding values from a dict:
# new_row = ""
# new_row = += [val for val in mydict['mykey'].values()]