Installing Playwright on Streamlit Cloud

Community Cloud
1

I’ve had no problem using Playwright on Streamlit locally. But when I try to deploy the app using Github (and installed all dependencies via requirements.txt), it doesn’t seem to work because Playwright requires the additional “playwright install” command via the terminal to install browser binaries.

I get the following error:

2022-09-22 06:10:47.874 Uncaught app exception

Traceback (most recent call last):

  File "/home/appuser/venv/lib/python3.9/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 556, in _run_script

    exec(code, module.__dict__)

  File "/app/feedings/main_pw.py", line 14, in <module>

    browser = p.chromium.launch()

  File "/home/appuser/venv/lib/python3.9/site-packages/playwright/sync_api/_generated.py", line 11678, in launch

    self._sync(

  File "/home/appuser/venv/lib/python3.9/site-packages/playwright/_impl/_sync_base.py", line 104, in _sync

    return task.result()

  File "/home/appuser/venv/lib/python3.9/site-packages/playwright/_impl/_browser_type.py", line 93, in launch

    Browser, from_channel(await self._channel.send("launch", params))

  File "/home/appuser/venv/lib/python3.9/site-packages/playwright/_impl/_connection.py", line 43, in send

    return await self._connection.wrap_api_call(

  File "/home/appuser/venv/lib/python3.9/site-packages/playwright/_impl/_connection.py", line 387, in wrap_api_call

    return await cb()

  File "/home/appuser/venv/lib/python3.9/site-packages/playwright/_impl/_connection.py", line 78, in inner_send

    result = next(iter(done)).result()

playwright._impl._api_types.Error: Executable doesn't exist at /home/appuser/.cache/ms-playwright/chromium-1024/chrome-linux/chrome

╔════════════════════════════════════════════════════════════╗

║ Looks like Playwright was just installed or updated.       ║

║ Please run the following command to download new browsers: ║

║                                                            ║

║     playwright install                                     ║

║                                                            ║

║ <3 Playwright Team                                         ║

╚════════════════════════════════════════════════════════════╝

Is there a simple solution for this?

2

I got Playwright to work but not sure if this is the best solution. To overcome the above issue, I included

import os
os.system("playwright install")

at the top of my code, and added a packages.txt file to my Github containing:

libnss3
libnspr4
libatk1.0-0
libatk-bridge2.0-0
libcups2
libdrm2
libxkbcommon0
libxcomposite1
libxdamage1
libxfixes3
libxrandr2
libgbm1
libpango-1.0-0
libcairo2
libasound2
libatspi2.0-0
libwayland-client0
2 Likes
3

How to call your playwright function?

I tried this, but not work:

if platform.system() == 'Windows':
    loop = asyncio.ProactorEventLoop()
    asyncio.set_event_loop(loop)
else:
    loop = asyncio.get_event_loop()
bar=loop.run_until_complete(foo())

Could you please share a example?
Thank you!

4

I run playwright in streamlit cloud, there are errors like this:

playwright._impl._api_types.Error: 

╔══════════════════════════════════════════════════════╗

║ Host system is missing dependencies to run browsers. ║

║ Please install them with the following command:      ║

║                                                      ║

║     sudo playwright install-deps                     ║

║                                                      ║

║ Alternatively, use apt:                              ║

║     sudo apt-get install libnss3\                    ║

║         libnspr4\                                    ║

║         libatk1.0-0\                                 ║

║         libatk-bridge2.0-0\                          ║

║         libcups2\                                    ║

║         libdrm2\                                     ║

║         libatspi2.0-0\                               ║

║         libxcomposite1\                              ║

║         libxdamage1\                                 ║

║         libxfixes3\                                  ║

║         libxrandr2\                                  ║

║         libgbm1\                                     ║

║         libxkbcommon0\                               ║

║         libpango-1.0-0\                              ║

║         libcairo2\                                   ║

║         libasound2                                   ║

║                                                      ║

║ <3 Playwright Team

How could I install the deps using sudo ? is there any solution? Thanks.

5

Hello , To resolve this, you’ll need to ensure that all required packages are included in your packages.txt file , Include a packages.txt file: Streamlit Cloud also allows you to specify system-level packages that need to be installed. Playwright requires some additional packages to be installed on the system level. Create a packages.txt file in the root of your project with the following content:

libnss3
libnspr4
libatk1.0-0
libatk-bridge2.0-0
libcups2
libdrm2
libatspi2.0-0
libxcomposite1
libxdamage1
libxfixes3
libxrandr2
libgbm1
libxkbcommon0
libpango-1.0-0
libcairo2
libasound2

========================================

image
image448×406 7.62 KB

1 Like
6

I had to install a few additional libs in packages.txt

libnss3
libatk1.0-0
libatk-bridge2.0-0
libcups2
libxcomposite1
libxrandr2
libgbm1
libpango-1.0-0
libpangocairo-1.0-0
libasound2
libxdamage1
libxkbcommon0
libgtk-3-0
libx11-xcb1
libxslt1-dev
libevent-dev
libopus-dev
flite1-dev
libwebp-dev
libharfbuzz-dev
libenchant-2-dev
libsecret-1-dev
libhyphen-dev
libegl1-mesa-dev
libgl1-mesa-glx
libgles2-mesa-dev
libx264-dev
libwoff1
libmanette-0.2-0
libgudev-1.0-0
7

After following the advice here I was still having problems, with errors in the terminal saying that dependencies weren’t being met - yet when I tried adding those dependencies to packages.txt, they couldn’t be found.

Long story short, Streamlit Community Cloud seems to be running on a version of Debian which doesn’t have access to the libraries that the latest Playwright (1.57.0, at this time) wants. Pinning Playwright to an earlier version got things working. I pinned to playwright==1.49.0