Cannot handle PYWINAUTO related exceptions with `try except` block in Python properly?

Question

My main goal: Automating Zoom

my zoomModule.py file is:

import os, pywinauto
from pywinauto import Desktop
from pywinauto import findwindows
from pywinauto.application import Application
from pywinauto.keyboard import send_keys

# Create a instance of Application()
app = Application(backend="uia")


def get_Zoom_Main_Window():
    """starts and connect to zoom main window"""
    zoom_exe_path = os.path.join(
        os.environ["USERPROFILE"], "AppData", "Roaming", "Zoom", "bin", "Zoom.exe"
    )
    try:
        print("starts and connect to zoom main window")
        start = app.start(
            zoom_exe_path,
            timeout=100,
        )
        print("1. Zoom Started")
        connected = start.connect(title="Zoom", timeout=5)
        print("1. Zoom Connected")
        return connected
    except (
        pywinauto.findwindows.ElementNotFoundError,
        pywinauto.timings.TimeoutError,
    ) as e:
        print("Err_context before 2nd try: ", e.__context__)
        try:
            print("Second try")
            start = app.start(
                zoom_exe_path,
                timeout=100,
            )
            print("2. Zoom started")
            connected = start.connect(title="Zoom - Not connected", timeout=20)
            print("2. Zoom connected")
            return connected
        except (
            pywinauto.findwindows.ElementNotFoundError,
            pywinauto.timings.TimeoutError,
        ) as err:
            print(err.__context__)
            print("Unknown Problem; Check internet connection and try again!")


def open_join_meeting_window():
    """opens the Join Meeting Popup Window; returns the Join Meeting Window"""
    zoomMainWin = get_Zoom_Main_Window()
    zoomMainWin["Zoom"].child_window(
        title="Home", control_type="TabItem"
    ).wrapper_object().click_input()
    zoomMainWin["Zoom"].child_window(
        title="Join", control_type="Button"
    ).wrapper_object().click_input()
    try:
        joinMeetingWin = app.connect(title="Join Meeting", timeout=15)
        print("Connected to Join Meeting Window.")
    except (findwindows.ElementNotFoundError, pywinauto.timings.TimeoutError) as e:
        print("Err before joinMeetingWin: ", e)
        pass
        # joinMeetingWin['Join Meeting']


hek = open_join_meeting_window()
print("Haa! out of the function")

Terminal, when I run the above file:

PS D:\PythonDevelopment\my_CLI_tools> python zoomModule.py
starts and connect to zoom main window
1. Zoom Started
1. Zoom Connected
Err before joinMeetingWin:  
Haa! out of the function
PS D:\PythonDevelopment\my_CLI_tools>

See how e does not get printed or remain blank after Err before joinMeetingWin: in the open_join_meeting_window().
The same happens for the try-except block inside the get_Zoom_Main_Window()

I have looked for help in google, but in vain.

What I want to achieve?

Minimum expectation: I can print() the errors raised by pywinauto to the console/terminal without crashing my code.
More expectation: I can avoid try-except blocks in my code if possible. Implement better way of finding and connecting to the required window, getting hold of child_window() and switching between open windows.

My approach may be wrong. In that case please show me the correct procedure.

@abdou_dev Can you help me with this. please ?? – Curious Learner Oct 18 '21 at 09:42 — Curious Learner, Oct 18 '21 at 09:42
please someone help!!! – Curious Learner Oct 18 '21 at 10:14 — Curious Learner, Oct 18 '21 at 10:14
@VasilyRyabov Can you please help me! I am really stuck. – Curious Learner Oct 18 '21 at 10:21 — Curious Learner, Oct 18 '21 at 10:21

score 2 · Accepted Answer · edited Oct 19 '21 at 11:44

Seems like I have figured out how to print() the errors raised by pywinauto to the console/terminal without crashing my code with the help of this answer.

open_join_meeting_window function - Before ↓↓↓

# after imports
def open_join_meeting_window():
    """opens the Join Meeting Popup Window; returns the Join Meeting Window"""
    zoomMainWin = get_Zoom_Main_Window()
    zoomMainWin["Zoom"].child_window(
        title="Home", control_type="TabItem"
    ).wrapper_object().click_input()
    zoomMainWin["Zoom"].child_window(
        title="Join", control_type="Button"
    ).wrapper_object().click_input()
    try:
        joinMeetingWin = app.connect(title="Join Meeting", timeout=15)
        print("Connected to Join Meeting Window.")
    except (findwindows.ElementNotFoundError, pywinauto.timings.TimeoutError) as e:
        print("Err before joinMeetingWin: ", e)
        pass

open_join_meeting_window function - after modification ↓↓↓

def open_join_meeting_window():
    """opens the Join Meeting Popup Window; returns the Join Meeting Window"""
    zoomMainWin = get_Zoom_Main_Window()
    zoomMainWin["Zoom"].child_window(
        title="Home", control_type="TabItem"
    ).wrapper_object().click_input()
    zoomMainWin["Zoom"].child_window(
        title="Join", control_type="Button"
    ).wrapper_object().click_input()
    try:
        joinMeetingWin = app.connect(title="Join Meeting", timeout=15)
        print("Connected to Join Meeting Window.")
    except Exception as e:
        logging.error(traceback.format_exc())
        if e.__class__.__name__ == "TimeoutError":
            print("[TimeoutError]:- The `Join Meeting Window` is taking longer time to appear.")
    print("Passed the try-except block!!")
        pass

New terminal logs↓↓↓

ERROR:root:Traceback (most recent call last):
  File "C:\Users\RAKTIM BHATTACHARYA.000\AppData\Local\Programs\Python\Python39\lib\site-packages\pywinauto\timings.py", line 436, in wait_until_passes
    func_val = func(*args, **kwargs)
  File "C:\Users\RAKTIM BHATTACHARYA.000\AppData\Local\Programs\Python\Python39\lib\site-packages\pywinauto\findwindows.py", line 87, in find_element  
    raise ElementNotFoundError(kwargs)
pywinauto.findwindows.ElementNotFoundError: {'title': 'hhh', 'backend': 'uia', 'visible_only': False}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\PythonDevelopment\Lake\zoom\getJoinMeetingWindow.py", line 14, in open_join_meeting_window
    joinMeetingWin = app.connect(title="hhh", timeout=6)
  File "C:\Users\RAKTIM BHATTACHARYA.000\AppData\Local\Programs\Python\Python39\lib\site-packages\pywinauto\application.py", line 990, in connect      
    self.process = timings.wait_until_passes(
  File "C:\Users\RAKTIM BHATTACHARYA.000\AppData\Local\Programs\Python\Python39\lib\site-packages\pywinauto\timings.py", line 458, in wait_until_passes
    raise err
pywinauto.timings.TimeoutError

[TimeoutError]:- The `Join Meeting Window` is taking longer time to appear.
Passed the try-except block!!

First, the traditional traceback is printed. Then the name of the error raised by pywinauto is used in the control-flow to decide what to do.

What's you exactly problem ? do you want to print the exception or to solve the exceptions? — abdou_dev, Oct 19 '21 at 08:14
@abdou_dev solve the exceptions and print them without crashing the program. Please see the **What I want to achieve** part in my question. — Curious Learner, Oct 19 '21 at 19:55
@abdou_dev please see this post, if you can help me? [post link](https://stackoverflow.com/q/69646142/17123424) — Curious Learner, Oct 20 '21 at 12:42

score 0 · Answer 2 · answered Oct 20 '21 at 13:14

0

Change this :

 joinMeetingWin = app.connect(title="Join Meeting", timeout=6)

by this :

 joinMeetingWin = app.connect(title="Join", timeout=6)

answered Oct 20 '21 at 13:14

abdou_dev

805
1
10
28

that does not make any difference – Curious Learner Oct 20 '21 at 13:25
See this : https://github.com/pywinauto/pywinauto/issues/859 – abdou_dev Oct 20 '21 at 13:26

Cannot handle PYWINAUTO related exceptions with `try except` block in Python properly?

What I want to achieve?

2 Answers2

Linked