engine_dict = {
'arxiv' : 'http://arxiv.org/search',
'front' : 'http://front.math.ucdavis.edu/search?q=',
'google' : 'http://www.google.com/search?q=',
'python' : 'http://www.google.com/search?as_q=site%3Adocs.python.org&q=',
'sage_groups' : 'http://www.google.com/custom?as_q=more:group&hl=en&client=google-coop-np&cof=FORID%3A13%3BAH%3Aleft%3BCX%3ASage%2520Infobase%3BL%3Ahttp%3A//www.google.com/coop/intl/en/images/custom_search_sm.gif%3BLH%3A65%3BLP%3A1%3BVLC%3A%23551a8b%3BGFNT%3A%23666666%3BDIV%3A%23cccccc%3B&adkw=AELymgWTTzvpoYsc_s7Np4sJ8KRz2KQrfROd8irzvyy31imt9iGiffg4X-EFUIs2XJZpUyorgWisnUJQNU_yVoluiTn9eqQbT5OYBgw-JOnxrLqxKNvyGWIUDFq5CWR5T_bJpppvtLm9W8PWu6iduoCcVGK_tuYPB0ll2KiOBi-hKPdKxnqfSxr53lQn92MFVHOQvkZomGI5rzMUIRxbmqQysqwTeXZWfg&boostcse=0&cx=017384562579735769466%3As27byrlaffu&q=',
'sage_trac' : 'http://trac.sagemath.org/sage_trac/search?noquickjump=0&q=',
'sage_ticket' : 'http://trac.sagemath.org/sage_trac/search?noquickjump=0&q=%23',
'wiki' : 'http://www.wikipedia.org/search-redirect.php?language=en&search=',
'youtube' : 'http://youtube.com/results?search_query='
}