title: Selenium browser instance can be accessible from a different process?
body: <p>What I am currently trying to do is the following. There are a number of changing values (js driven) in a website that I am monitoring and saving to a database using Selenium. The values are read through infinite loops, from elements found with selenium's find_element.</p>
  
  <p>This works as intended with one process. However, when I try to multiprocess this (to monitor multiple values at the same time), there seems to be no way to do it without opening one separate browser for each process (unfeasible, since we are talking about close to 60 different elements).</p>
  
  <p>The browser I open before multiprocessing seems to not be available from within the various processes. Even if I find the elements before the multiprocessing step, I cannot pass them to the process since the webelements can't be pickled.</p>
  
  <p>Am I doing something wrong, is selenium not the tool for the job, or is there another way?</p>
  
  <p>The code below doesn't actually work, it's just meant to show the structure of what I currently have as a "working version". What I need to get away from is opening the browser from within the function and have all my processes relying on a single browser.</p>
  
  <pre><code>import time
  import datetime
  import os
  from selenium import webdriver
  from multiprocessing import Pool
  
  def sampling(value_ID):
      dir = os.path.dirname(__file__)
  
      driver = webdriver.Firefox(dir)
      driver.get("https:\\website.org")
  
      monitored_value = driver.find_element_by_xpath('value_ID')
  
      while(1):
              print(monitored_value.text)
              time.sleep(0.1)
  
  value_array = [1,2,3,4,5,6]
  
  if __name__ == '__main__':
      with Pool(6) as p:
          p.map(getSampleRT, value_array)
  </code></pre>