On Tue, 14 Jun 2011 12:53:11 +0000, Steve Crook wrote: > On Tue, 14 Jun 2011 05:37:45 -0700 (PDT), AlienBaby wrote in Message-Id: > <078c5e9a-8fad-4d4c-b081-f69d0f575...@v11g2000prk.googlegroups.com>: > >> How do those methods compare to the one I normally use; >> >> try: >> dict[key]+=1 >> except: >> dict[key]=1 > > This is a lot slower in percentage terms. You should also qualify the > exception: except KeyError
Not necessarily. It depends on how often you have KeyError. By my measurements, if the key is usually present, it is faster to use try...except. Only if the key is frequently missing does it become faster to test first. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
