How to change part of the value string in Python Dictionary?

[perfringo]

This is homework and no effort shown....

However, for learning purposes I provide alternative which should be shorter and without using 'temp':

>>> recs = {1: ['Susan Smith', '[email protected]'],
            2: ['Cole Brown', '[email protected]'],
            3: ['Sue John', '[email protected]']}
>>> for key in recs:
...     recs[key] = [item.replace('.com', '.org') for item in recs[k]]
...
>>> recs
{1: ['Susan Smith', '[email protected]'],
 2: ['Cole Brown', '[email protected]'],
 3: ['Sue John', '[email protected]']}

If values are consistent and their structure doesn't change then no need to iterate over all items and rebuild the whole list, only change second value (changing .org back to .com):

>>> for key in recs: 
...     recs[key][1] = recs[key][1].replace('.org', '.com') 
...      
>>> recs                                                            
{1: ['Susan Smith', '[email protected]'],
 2: ['Cole Brown', '[email protected]'],
 3: ['Sue John', '[email protected]']}