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from selenium import webdriver
from pyvirtualdisplay import Display
display = Display(visible=0, size=(800, 600))
display.start()
driver = webdriver.Firefox()
driver.get("http://python.org/")
list_links = driver.find_elements_by_tag_name('img')
for i in list_links:
	print i.get_attribute('src')
driver.quit()
display.stop()

  File "sel.py", line 5, in <module>
    driver = webdriver.Firefox()
  File "/usr/lib/python2.6/site-packages/selenium/webdriver/firefox/webdriver.py", line 59, in __init__
    self.binary, timeout),
  File "/usr/lib/python2.6/site-packages/selenium/webdriver/firefox/extension_connection.py", line 47, in __init__
    self.binary.launch_browser(self.profile)
  File "/usr/lib/python2.6/site-packages/selenium/webdriver/firefox/firefox_binary.py", line 66, in launch_browser
    self._wait_until_connectable()
  File "/usr/lib/python2.6/site-packages/selenium/webdriver/firefox/firefox_binary.py", line 100, in _wait_until_connectable
    raise WebDriverException("The browser appears to have exited "
selenium.common.exceptions.WebDriverException: Message: The browser appears to have exited before we could connect. If you specified a log_file in the FirefoxBinary constructor, check it for details.