def create_state_capital_dictionary(): """Create a dictionary that maps a state name to its capital.

This dictionary should contain at least the following three states and capitals: The capital of California is Sacramento. The capital of Washington is Olympia. The capital of Oregon is Salem.

>>> capitals = create_state_capital_dictionary()

>>> capitals['California'] 'Sacramento'

>>> capitals['Washington'] 'Olympia'

>>> capitals['Oregon'] 'Salem' """