Loop through a dict changing keys

[Ian Kelly]

On Mon, Oct 17, 2011 at 10:21 AM, 88888 dihedral
<dihedral88888 at googlemail.com> wrote:
> Uh, sounds reasonable, if one loops over an index variable  that could be altered during the loop execution then the loop may not end as expected.

>From the docs:  "Iterating views while adding or deleting entries in
the dictionary may raise a RuntimeError or fail to iterate over all
entries."

Changing the values of existing entries while iterating is considered
to be safe, though.