This Python program takes an Excel workbook containing invoice numbers and downloads PDFs of those invoices from RQ, a point-of-sale system.

Here’s how I did it.

from openpyxl import load_workbook
import pyautogui
import time
from datetime import datetime
from pywinauto.application import Application

I use openpyxl to interact with the Excel workbook that has the invoices to download.

I think I had to use specific versions, downgrading as needed to get things to work so I will list the libraries and the versions I used here:

Library Version
PyAutoGUI 0.9.48
openpyxl 3.0.0
pywinauto 0.6.8
# open excel spreadsheet
wb = load_workbook('invoicenumbers.xlsx')
ws = wb['Sheet1']
last_row = ws.max_row

I open the Excel spreadsheet named invoicenumbers.xlsx and store it in a variable named wb. I take the sheet named Sheet1 and store it in a variable named ws. I find the value of the last row in the sheet and store it in a variable named last_row.

commandline = '"C:\Program Files (x86)\iQmetrix\RQ4\RetailiQ.WPF\RetailiQ.Windows.WPF.exe" /component IQ.WPFBrowser "C:\Program Files (x86)\iQmetrix\RQ4\IQ.WPFBrowser"'
app = Application(backend="uia").start(commandline)

I find the command line to launch RQ using Process Explorer and trim it down to what’s needed to launch the application. I store that in a variable named commandline.

I launch the application using pywinauto’s start function and hold a reference to the application in a variable named app.

while not app.RQ.exists():

I wait for the application to launch, checking every 5 seconds, before proceeding.

# txtEmployeeName

# txtPassword

# btnLogin

I use inspection tools to find the names of the GUI components.

I enter my username and password in the login screen and click on the “Sign In” button. I use child_window, set_text, and click to do this.

while not app.RQ.child_window(title="RQ.Windows.UI.Consoles.Facades.ReportsConsoleFacade").exists():
    print('Waiting for home page to appear.')

I wait for the login process to finish, checking every second, before proceeding.

# loop through invoice numbers
for x in range(1, last_row + 1):
    if > datetime.fromisoformat('2021-11-15T02:30:00'):

I start the for loop to go through all the invoice numbers in the Excel workbook. I check the current date and time at the beginning of each loop and stop if it’s 2:30 AM of the following day because it seemed like the RQ servers were rebooted at 3:00 AM and caused the program to error out.

    sentinel = ws.cell(row=x, column=2).value

I check for a marker indicating that the row has already been processed. I store that in a variable named sentinel.

    if sentinel != 'x':
        invoice_number = ws.cell(row=x, column=1).value

        # click on search button 1492, 13, 13)

If sentinel does not hold the value ‘x’, the invoice has not yet been downloaded and I start with the meat of the program.

I get the invoice number in the current row and store it in a variable named invoice_number.

I tried addressing the search bar by name but couldn’t get it to work after several hours of trying. To get around this, I set the monitor resolution to 1920 x 1080 and use pyautogui to click on the screen using XY coordinates. I find the coordinates by taking a screenshot, pasting the image into Paint, and hovering over the target element. I wait 3 seconds after clicking to account for rendering time.


I use pyautogui’s typewrite and press functions to enter the invoice number in the search bar and initiate the search.

        while not app.RQ.child_window(title="Scan Anywhere").exists():
            print("waiting for scan anywhere")

I wait for the invoice dialog to appear, checking every second, before proceeding.

        # click on view invoice, 480)
        while not app.window(title='Sale Invoice').exists():
            print('waiting for sale invoice')

        # click on save button, 67)
        while not app.window(title='Sale Invoice').child_window(title="Save As").exists():
            print('waiting for save as')


        while not app.window(title='Sale Invoice').child_window(title="Save as PDF").exists():
            print('waiting for save as pdf')

        # click on ok, 694)
        pyautogui.hotkey('alt', 'f4')

I use XY coordinates to click on buttons that are not easily accessed by name. I use the invoice number for the file name. I use pywinauto’s exists function to check that windows have finished rendering before proceeding.

        app.window(title='Sale Invoice')

        ws.cell(row=x, column=2).value = 'x''invoicenumbers.xlsx')

        print('finished row {}'.format(x))


I close all the windows that were opened in the process of retrieving and saving the invoice. I mark the row as finished by writing an ‘x’ in the second column. I save the workbook.

The loop restarts and looks for the next row that hasn’t been processed.


When all the rows have been processed, I close RQ and exit the program.