Discussion about PEP 234: iterators

[Raymond Hettinger]

I think dictionary iteration should match iterations on other objects/types
as closely as possible unless performance is impacted.

for elem in list                # does not automatically sort
for key in dict                # so this should not automatically sort

for key:value in dict        # proposed
for index:item in list        # so this should work

if elem in list                # this works
if key in dict                # so this should work

map( fun, list )            # this works
map( func, dict )        # so this should work with functions that take a key as
a parameter

filter( boolfun, list )        # gives a possibly smaller list
filter( boolfun, dict )        # so this should return a possibly smaller
dictionary


Thanks,

Raymond