Python | 辞書を空にする方法

iPython

In [1]: staff = {1: 'test1', 2: 'test2', 3: 'test3'}

In [2]: staff
Out[2]: {1: 'test1', 2: 'test2', 3: 'test3'}

In [3]: staff.clear()

In [4]: staff
Out[4]: {}