How to debug python application under uWSGI?

Question

When I'm trying to use python pdb debugger under uWSGI, the execution doesn't stop on breakpoint, it just return trackback.

here is the code:

def application(env, start_response):     import pdb; pdb.set_trace()     start_response('200 OK', [('Content-Type','text/html')])     return "Hello World" 

this is how I run it:

uwsgi --http 127.0.0.1:7777  --wsgi-file uwsgi_test.py 

and this is what I get:

/home/andrey/Development/ttt/uwsgi_test.py(3)application() -> start_response('200 OK', [('Content-Type','text/html')]) (Pdb)  Traceback (most recent call last):   File "uwsgi_test.py", line 3, in application     start_response('200 OK', [('Content-Type','text/html')])   File "uwsgi_test.py", line 3, in application     start_response('200 OK', [('Content-Type','text/html')])   File "/usr/lib/python2.7/bdb.py", line 48, in trace_dispatch     return self.dispatch_line(frame)   File "/usr/lib/python2.7/bdb.py", line 67, in dispatch_line     if self.quitting: raise BdbQuit bdb.BdbQuit [pid: 11421|app: 0|req: 1/1] 127.0.0.1 () {32 vars in 366 bytes} [Sun Aug 25 13:12:06 2013] GET / => generated 0 bytes in 63 msecs (HTTP/1.1 500) 0 headers in 0 bytes (0 switches on core 0) 

Answer 1

Being a server, uWSGI closes the stdin (effectively it remaps it to /dev/null).

If you need stdin (as when you need a terminal debugger) add:

--honour-stdin