python urlpattern newbie question [closed]

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I'm trying this pattern:

(r'^jobs/(?P<job_id>\d+)/$', job_handler)

To work with jobs/ and jobs/{job_id}, but the above expression doe开发者_如何学JAVAsn't cover the first case(jobs/), it only work if I do something like:

(r'^jobs/$', job_handler),
(r'^jobs/(?P<job_id>\d+)/$', job_handler) 

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You need to make the second part optional:

(r'^jobs/(?:(?P<job_id>\d+)/)?$', job_handler)