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

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Chapters
00:00 'Too Many Values To Unpack', Iterating Over A Dict. Key=≫String, Value=≫List
00:24 Accepted Answer Score 602
00:49 Answer 2 Score 40
01:11 Answer 3 Score 89
01:24 Answer 4 Score 14
01:35 Thank you

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Full question
https://stackoverflow.com/questions/5466...

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Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

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Tags
#python

#avk47

ACCEPTED ANSWER

Score 602

Python 3

Use items().

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

Python 2

Use 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.

For reference, iteritems() was removed in Python 3.

ANSWER 2

Score 89

For Python 3.x iteritems has been removed. Use items instead.

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

ANSWER 3

Score 40

You want to use iteritems. This returns an iterator over the dictionary, which gives you a tuple(key, value)

>>> for field, values in fields.iteritems():
...     print field, values
... 
first_names ['foo', 'bar']
last_name ['gravy', 'snowman']

Your problem was that you were looping over fields, which returns the keys of the dictionary.

>>> for field in fields:
...     print field
... 
first_names
last_name

ANSWER 4

Score 14

For lists, use enumerate

for field, possible_values in enumerate(fields):
    print(field, possible_values)

iteritems will not work for list objects