Programmatic web browsing module with AJAX support for Python
Python JavaScript Shell
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Spynner is a stateful programmatic web browser module for Python. It is based upon PyQT and WebKit, so it supports Javascript, AJAX, and every other technology that !WebKit is able to handle (Flash, SVG, ...). Spynner takes advantage of JQuery. a powerful Javascript library that makes the interaction with pages and event simulation really easy.

Using Spynner you would able to simulate a web browser with no GUI (though a browsing window can be opened for debugging purposes), so it may be used to implement crawlers or acceptance testing tools.








Open an Issue to report a bug or request a new feature. Other comments and suggestions can be directly emailed to the authors.


  • Throught regular easy_install / buildout:

    easy_install spynner
  • The bleeding edge version is hosted on github:

    git clone spynner
    cd spynner
    python install


You can generate the API locally (will create docs/api directory):

python gen_doc


A basic example:

import spynner
browser = spynner.Browser()
browser.runjs("console.log('I can run Javascript')")
browser.runjs("console.log('I can run jQuery: ' + jQuery('a:first').attr('href'))")"#esen")
browser.wk_fill("input[name=enit]", "hola")"input[name=b]")
print browser.url, browser.html

Sometimes you'll want to see what is going on:

browser = spynner.Browser()
browser.debug_level = spynner.DEBUG

See more examples in the repository:

Interact with the controls

  • See the implementation docstrings or examples !
  • You have three levels of control:
    • webkit methods which are recommended to us (wk_fill_*, wk_click_*) which are jquery based
    • classical methods (fill, click_*) which are jquery based
    • low level using QT raw events which are not that well working ATM. At least, you can move the mouse

Running Javascript

Spynner uses jQuery to make Javascript interface easier. By default, two modules are injected to every loaded page:

  • JQuery core Amongst other things, it adds the powerful JQuery selectors, which are used internally by some Spynner methods. Of course you can also use jQuery when you inject your own code into a page.
  • Simulate jQuery plugin: Makes it possible to simulate mouse and keyboard events (for now spynner uses it only in the _click_ action). Look up the library code to see which kind of events you can fire.

Note that you must use __jQuery(...)_ instead of _jQuery(...)_ or the common shortcut _$(...)_. That prevents name clashing with the jQuery library used by the page.

Cook your soup: parsing the HTML

You can parse the HTML of a webpage with your favorite parsing library BeautifulSoup, lxml ,.. Since we are already using Jquery for Javascript, it feels just natural to work with pyquery, its Python counterpart:

import spynner
import pyquery
browser = spynner.Browser()
d = pyquery.Pyquery(browser.html)
href = d("#somelink").attr("href"), open("/path/outputfile", "w"))

Running Spynner without X11