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This article mainly introduces "how to install and use Python Playwright". In daily operation, I believe many people have doubts about how to install and use Python Playwright. Xiaobian consulted various materials and sorted out simple and easy operation methods. I hope to help you answer the doubts about "how to install and use Python Playwright"! Next, please follow the small series to learn together!

1. Introduction to Playwright

Playwright is a powerful Python library that automates Chromium, Firefox, WebKit and other mainstream browsers with just one API, and supports headless mode and headed mode.

Playwright provides automation technology that is green, powerful, reliable and fast, and supports Linux, Mac and Windows operating systems.

From the official website explanation, the official positioning of Playwright is a true sense of the Web end-to-end testing tool.

2. Playwright installation

Playwright is powerful, but its installation steps are very simple and only take 2 steps:

Step 1: Install the playwright Python dependency library (note that the playwright library needs to be Python 3.7 + or above)

#This could be pip/pip3, or both

pip3 install playwright

You can check its dependency information at https://pypi.org/project/playwright/.

Step 2: Install mainstream browser drivers

This will download Chrome, Firefox, Webkit browser drivers locally

#Install browser driver (installation process is a bit slow, please wait patiently)

python3 -m playwright install

To see what Playwright supports, type:

python3 -m playwright helpUsage: index [options] [command]Options: -V, --version output the version number -b, --browser browser to use, one of cr, chromium, ff, firefox, wk, webkit (default: "chromium") --color-scheme emulate preferred color scheme, "light" or "dark" --device emulate device, for example "iPhone 11" --geolocation specify geolocation coordinates, for example "37.819722,-122.478611" --lang specify language / locale, for example "en-GB" --proxy-server specify proxy server, for example "http://myproxy:3128" or "socks5://myproxy:8080" --timezone time zone to emulate, for example "Europe/Rome" --timeout timeout for Playwright actions in milliseconds (default: "10000") --user-agent specify user agent string --viewport-size specify browser viewport size in pixels, for example "1280, 720" -h, --help display help for commandCommands: open [url] open page in browser specified via -b, --browser cr [url] open page in Chromium ff [url] open page in Firefox wk [url] open page in WebKit codegen [options] [url] open page and generate code for user actions screenshot [options] capture a page screenshot pdf [options] save page as pdf install Ensure browsers necessary for this version of Playwright are installed help [command] display help for command

As you can see from the command line help information, Playwright supports a lot of features!

3. Practical demonstration

As mentioned at the beginning, Playwright does not require writing a line of code, we just manually manipulate the browser, it records our actions, and then automatically generates code scripts.

Recording scripts

Let's first look at the command description for the recording script

python3 -m playwright codegen --helpUsage: index codegen [options] [url]open page and generate code for user actionsOptions: -o, --output saves the generated script to a file --target language to use, one of javascript, python, python-async, csharp (default: "python") -h, --help display help for commandExamples: $ codegen $ codegen --target=python $ -b webkit codegen https://example.com

of which:

python -m playwright codegen recording script

-help Help documentation

-o Generate a directory of automation scripts

-target Script language, including JS and Python, corresponding values are: python and javascript respectively

-b Specify browser driver

For example, I want to search baidu.com, use chromium driver, save the results as mikezhou.py python file.

#We open Chrome to start recording scripts #Specify the build language as:Python (default Python, optional)#Save file name: mikezhou.py (optional)#Browser driver: webkit (default webkit, optional)#Finally follow the target website to open (default browser only, optional) python3 -m playwright codegen --target python -o 'mikezhou.py' -b chromium https://www.baidu.com

Command line input will automatically open the browser, and then you can see that every move on the browser will be automatically translated into code, as shown below:

Finally, the automation script will be automatically generated and saved to the file mikezhou.py, and all of the above manual operations will be automatically converted into code:

from playwright import sync_playwrightdef run(playwright): browser = playwright.chromium.launch(headless=False) context = browser.newContext() # Open new page page = context.newPage() # Go to https://www.baidu.com/ page.goto("https://www.baidu.com/") # Click input[name="wd"] page.click("input[name=\"wd\"]") # Fill input[name="wd"] page.fill("input[name=\"wd\"]", "Wo Mu Da") # Press CapsLock page.press("input[name=\"wd\"]", "CapsLock") # Fill input[name="wd"] page.fill("input[name=\"wd\"]", "automated test practice book") # Press Enter page.press("input[name=\"wd\"]", "Enter") # assert page.url() == "https://www.baidu.com/s? ie=utf-8&f=8&rsv_bp=1&rsv_idx=1&tn=baidu&wd=%E8%87%AA%E5%8A%A8%E5%8C%96%E6%B5%8B%E8%AF%95%E5%AE%9E%E6%88%98%E5%AE%9D%E5%85%B8%20&fenlei=256&rsv_pq=af40e9aa00012d5a&rsv_t=c659gpz2%2Fjri1SAoIXdT9gP%2BmrqufXzRtMSSAL0n0fv7GSoLF5vaiNVPA3U&rqlang=cn&rsv_enter=1&rsv_dl=tb&rsv_sug3=38&rsv_sug1=22&rsv_sug7=100&rsv_sug2=0&rsv_btype=i&inputT=8034&rsv_sug4=9153" # Close page page.close() # --------------------- context.close() browser.close()with sync_playwright() as playwright: run(playwright) At this point, the study of "how to install and use Python Playwright" is over, hoping to solve everyone's doubts. Theory and practice can better match to help you learn, go and try it! If you want to continue learning more relevant knowledge, please continue to pay attention to the website, Xiaobian will continue to strive to bring more practical articles for everyone!

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