>>> import shelve
>>> db = shelve.open('D:\PT2\persondb')
>>> len(db)
3
>>> list(db.keys())
['Sue Jones', 'Bob Smith', 'Tom Jones']
>>> bob = db['Bob Smith']
Traceback (most recent call last):
  File "C:\Python34\lib\shelve.py", line 111, in __getitem__
    value = self.cache[key]
KeyError: 'Bob Smith'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    bob = db['Bob Smith']
  File "C:\Python34\lib\shelve.py", line 114, in __getitem__
    value = Unpickler(f).load()
ImportError: No module named 'person'

ImportError: No module named 'person'

>>> import sys
# you could just move your person.py to a directory in the sys.path list
>>> sys.path.append(r"C:\Users\You\")
>>> import person

import person