On 24 mai, 19:21, "Christopher Anderson" <sidewinder.... at gmail.com> wrote: > > d=dict(a=1, b=2, c=3) > > for k, v in d.iteritems(): > > d[k]=d[k]+1 > > You might as well do: d[k] = v + 1, like for the list. ops, yes it was a typo