python - 'too many values to unpack', iterating over a dict. key=>string, value=>list

Question

I am getting the 'too many values to unpack' error. Any idea how I can fix this?

first_names = ['foo', 'bar']
last_names = ['gravy', 'snowman']

fields = {
    'first_names': first_names,
    'last_name': last_names,
}        

for field, possible_values in fields:  # error happens on this line              

Answer 1

Python 3

for field, possible_values in fields.items():
    print(field, possible_values)

Since Python 3 iteritems() is no longer supported. Use items() instead.

Python 2

You need to use something like iteritems.

for field, possible_values in fields.iteritems():
    print field, possible_values

See this answer for more information on iterating through dictionaries, such as using items(), across python versions.