These expensive stress testing SaaS applications, that charge an arm and a leg typically use this type of coding at some point in the back-end to simulate website traffic. This type of coding is also generally used for performance testing, stress testing a website by simulating multiple instances of real-users visiting the site. Selenium uses a chrome browser and goes through the website like a normal person would, clicking on buttons and links. Traditional scrapping does not work with dynamic sites that load content on the fly. Python and Selenium are really useful for scrapping JS based websites that load dynamically. This guide will show you how to set up an Ubuntu Virtual Private Server (VPS) for web scrapping with Selenium. The benefit of running this in the notebook is that you don't need to know the exact path to pip running in the same virtual environment as Jupyter, so I use this trick a lot.# Install Chrome Browser and Chromedriver Ubuntu 20.04 Since I was planning to use it from a Jupyter Notebook I actually installed it by running the following in a cell in a notebook: %pip install selenium I installed Selenium using pip for Python 3: pip install selenium Clicking that worked around the signing issue. To fix this, go to System Preferences -> Security & Privacy - there was a prompt there about the binary, with an "open this anyway" button. # A window displayed on macOS with an error The first time I ran it I got an error complaining that the binary has not been signed: ~/bin/chromedriver I decided to put this in my ~/bin directory. Unzipping this gave me a chromedriver binary file. I have Chrome 85 so I downloaded the chromedriver_mac64.zip file from Message: session not created: This version of ChromeDriver only supports Chrome version 85 Without using homebrewĬhromeDriver is available from the official website here: Knowing how to upgrade an existing version is useful if you are seeing an error like this one:
To upgrade an existing installation do this: brew upgrade chromedriver -cask You still need to run it once in the terminal chromedriver to get the macOS error, then allow it in the Security & Privacy preferences - see below. This also ensures chromedriver is on your path, which means you don't need to use an explicit chromedriver_path later on.
This is by far the easiest option: brew install chromedriver -cask Install the chromedriver binary If you have homebrew
I needed to run Selenium on macOS for the first time today. Simon Willison’s TILs Installing Selenium for Python on macOS with ChromeDriver Installing Selenium for Python on macOS with ChromeDriver | Simon Willison’s TILs
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