exit while loop with user prompt in python -

i've been browsing long time searching answer this.

i'm using python 2.7 in unix.

i have continuous while loop , need option user interrupt it, , after loop continue.

like:

while 2 > 1:      items in hello:          if "world" in items:              print "hello"          else:              print "world"        time.sleep(5)       here user interrupt loop pressing "u" etc. , modify elements inside loop.  

i started testing out raw_input, since prompts me out every cycle, it's don't need.

i tried methods mentioned here:

keyboard input timeout in python

couple of times, none of seem work how wish.

>>> try: ...    print 'ctrl-c end' ...    while(true): ...       pass ... except keyboardinterrupt, e: ...    print 'stopped' ...    raise ... ctrl-c end stopped traceback (most recent call last):   file "<stdin>", line 2, in <module> keyboardinterrupt >>> 

obviously need replace pass whatever doing , print aftermath.