How to use not_to_contain_text method in Playwright Python

There are two things to notice:

1. Python executable
2. Alternatives priority

Executable

Running in the base image:

# which python
# which python3
/usr/bin/python3
# ls -l /usr/bin/python*
lrwxrwxrwx 1 root root       9 Mar 13  2020 /usr/bin/python3 -> python3.8
-rwxr-xr-x 1 root root 5230592 Jun 22 20:18 /usr/bin/python3.8

With the following Dockerfile (from the question);

FROM mcr.microsoft.com/playwright
RUN apt update
RUN apt install -y software-properties-common
RUN add-apt-repository -y ppa:deadsnakes/ppa
RUN apt update
RUN apt install -y python3.10

RUN update-alternatives --install /usr/bin/python python /usr/bin/python3.10 1
RUN update-alternatives --install /usr/bin/python python /usr/bin/python3.8 2

python is now added and controlled by alternatives, but python3 is untouched:

# ls -l /usr/bin/python*
lrwxrwxrwx 1 root root      24 Dec 16 04:10 /usr/bin/python -> /etc/alternatives/python
lrwxrwxrwx 1 root root       9 Mar 13  2020 /usr/bin/python3 -> python3.8
-rwxr-xr-x 1 root root 5565184 Dec  7 01:12 /usr/bin/python3.10
-rwxr-xr-x 1 root root 5230592 Jun 22 20:18 /usr/bin/python3.8
# ls -l /etc/alternatives/python
lrwxrwxrwx 1 root root 18 Dec 16 04:10 /etc/alternatives/python -> /usr/bin/python3.8

Priority

From alternative's manpage:

If the group is in automatic mode, and the newly added alternatives' priority is higher than any other installed alternatives for this group, the symlinks will be updated to point to the newly added alternatives.

This is numeric, so it's not that 1 is the winner and 2 is second-best, but rather 2 is higher than 1.

Resolution

By changing both the executable form python to python3, and the priority so that 3.10 will be 2 and 3.8 will be 1 (as such):

FROM mcr.microsoft.com/playwright
RUN apt update
RUN apt install -y software-properties-common
RUN add-apt-repository -y ppa:deadsnakes/ppa
RUN apt update
RUN apt install -y python3.10

RUN update-alternatives --install /usr/bin/python3 python /usr/bin/python3.10 2
RUN update-alternatives --install /usr/bin/python3 python /usr/bin/python3.8 1

the default python version should be 3.10:

# which python
# which python3
# ls -l /usr/bin/python*
lrwxrwxrwx 1 root root      24 Dec 16 04:16 /usr/bin/python3 -> /etc/alternatives/python
-rwxr-xr-x 1 root root 5565184 Dec  7 01:12 /usr/bin/python3.10
-rwxr-xr-x 1 root root 5230592 Jun 22 20:18 /usr/bin/python3.8
# ls -l /etc/alternatives/python
lrwxrwxrwx 1 root root 19 Dec 16 04:16 /etc/alternatives/python -> /usr/bin/python3.10
# python3 --version
Python 3.10.9

I would do this:

1. Register a listener with expose_function.
2. Use evaluate to register a listener to newPosts. A Listener on the browser side.
3. Inside that listener call the function you exposed on 1.

I managed to make a code that closes only a specific tab!

all_pages = page.context.pages
await all_pages[1].close()

page.hover(selector[, options])

After that you can do

page.waitForSlector(selector,{timeout:6000})

And then do what you need for your elem. You can read this:

https://playwright.dev/docs/api/class-page#page-hover

You can use the not_be_visible expect assertion for this.

expect('element CSS here').not_to_be_visible()

By default expect assertions have a 5 second timeout, in case you want to increase the timeout, you can do like this:

expect('element CSS here').not_to_be_visible(timeout=7000)

They are saved in the same way, but in the second case you are overwriting the variable with return value of .screenshot method, which seems to be of the type bytes

I had a similar problem: I had PM2 run by an Apache Airflow Celery worker running a playwright task, hourly. The job hung.

I suspect it is the environment variables littered by Byobu and PM2. What worked for me was wrapping the Python script in a bash script and sanitizing the environment variable like the following:

#!/bin/bash
[ "$HOME" != "" ] && exec -c $0
# Your python script should come below:
/home/ubuntu/usr/venv-3.10-airflow/bin/airflow celery worker

The first line clears the env vars (as suggested in Sanitize environment with command or bash script?). Now you can run this script with pm2 start command. My worker ran fine for about 24 hours as of now. I hope this works for you too.

Heroku doesn't support webkit at the time, with other browsers, you can use this buildpack: https://github.com/mxschmitt/heroku-playwright-buildpack/

Try with:

await page.locator('//input[@value="Submit"]').click();

Or

await page.locator('//input[@type="submit"]').click();

Or

await page.locator('//input[@name="Submit1"]').click();

Then you are trying with Xpath, which should be enough if that is the only submit value/name/type of the page.

Basically with .locator you are locating the element and then with .click() you are making click on that element previously located

Fully working example

from playwright.sync_api import sync_playwright
import time

def run(playwright):
    chrome = playwright.chromium
    browser = chrome.launch(headless=False)
    context = browser.new_context()
    page = context.new_page()
    page.goto("https://suip.biz/?act=iscloudflare")
    page.locator("//input[@name='url']").fill("google.com")
    page.locator("//input[@value='Submit']").click()
    time.sleep(10)
    browser.close()

with sync_playwright() as playwright:
    run(playwright)