How to Handle \"Too Many Values to Unpack\" Error When Iterating Over Dictionaries?

Iterating Over a Dict: Resolving 'Too Many Values to Unpack' Error

When attempting to iterate through a dictionary where keys are strings and values are lists, using for field, possible_values in fields: may lead to the 'too many values to unpack' error.

To resolve this error, depending on the version of Python used, different approaches are required:

Python 3

In Python 3, items() should be used instead.

<code class="python">for field, possible_values in fields.items():
    print(field, possible_values)</code>

Python 2

In Python 2, iteritems() should be used.

<code class="python">for field, possible_values in fields.iteritems():
    print field, possible_values</code>

Alternatively, see [this answer](https://stackoverflow.com/a/19995911) for more details on iterating through dictionaries across Python versions, including the use of items() and the removal of iteritems() in Python 3.

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