How to iterate on a changing dictionary

From	TheSaint <nobody@nowhere.net.no>
Newsgroups	comp.lang.python
Subject	How to iterate on a changing dictionary
Followup-To	comp.lang.python
Date	2011-06-19 22:32 +0800
Organization	Aioe.org NNTP Server
Message-ID	<itl1a5$rom$1@speranza.aioe.org> (permalink)

Followups directed to: comp.lang.python

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Hello

Trying to pop some key from a dict while is iterating over it will cause an 
exception.
How I can remove items when the search result is true.

Example:

while len(dict):
   for key in dict.keys():
      if dict[key] is not my_result:
         dict.pop(key)
    else:
       condition_to_break
print('Dictionary is over')

this is my mistake, but where to fix?
-- 
goto /dev/null

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How to iterate on a changing dictionary TheSaint <nobody@nowhere.net.no> - 2011-06-19 22:32 +0800
  Re: How to iterate on a changing dictionary Chris Angelico <rosuav@gmail.com> - 2011-06-20 01:13 +1000
    Re: How to iterate on a changing dictionary Roy Smith <roy@panix.com> - 2011-06-19 11:53 -0400
      Re: How to iterate on a changing dictionary Terry Reedy <tjreedy@udel.edu> - 2011-06-19 12:51 -0400
  Re: How to iterate on a changing dictionary Terry Reedy <tjreedy@udel.edu> - 2011-06-19 12:02 -0400
  Re: How to iterate on a changing dictionary Lie Ryan <lie.1296@gmail.com> - 2011-06-20 03:00 +1000
    Re: How to iterate on a changing dictionary TheSaint <nobody@nowhere.net.no> - 2011-06-20 21:20 +0800
      Re: How to iterate on a changing dictionary Florencio Cano <florencio.cano@gmail.com> - 2011-06-20 16:30 +0200
      Re: How to iterate on a changing dictionary Terry Reedy <tjreedy@udel.edu> - 2011-06-20 13:37 -0400
        Re: How to iterate on a changing dictionary TheSaint <nobody@nowhere.net.no> - 2011-06-21 18:44 +0800

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