In article <mailman.616.1278927754.1673.python-l...@python.org>, Jean-Michel Pichavant <jeanmic...@sequans.com> wrote: >Aahz wrote: >> In article <mailman.488.1278697107.1673.python-l...@python.org>, >> Jean-Michel Pichavant <jeanmic...@sequans.com> wrote: >>> >>> PS : You're misusing the del statement. It does not remove any object >>> from mmory, however, it removes the reference to it, the object is still >>> in memory. They are very few cases where del is usefull in python, so >>> try to avoid using it as well. >> >> The first two sentences are true; the last sentence is completely wrong. >> I've got lots of code using del, and it's a critically useful element of >> dictionary manipulation. > >Can you please give a short example ? I'm not challenging though, just >curious.
Let's suppose you want to remove duplicate keys from a second dict: for k in d1: if k in d2: del d2[k] You could do d2.pop() instead, but I'll bet you'll find that it's slightly slower, which makes a difference in a tight loop. (Mainly, though, I learned this idiom long before pop() was available.) -- Aahz (a...@pythoncraft.com) <*> http://www.pythoncraft.com/ "....Normal is what cuts off your sixth finger and your tail..." --Siobhan -- http://mail.python.org/mailman/listinfo/python-list