human
I wrote the below code

    def mock_read_pid():
        return scenario['pidfile_pid']
    def mock_is_locked():
        return (scenario['locking_pid'] is not None)
    def mock_i_am_locking():
        return (scenario['locking_pid'] == scenario['pid'])
    def mock_acquire(timeout=None):
        if (scenario['locking_pid'] is not None):
            raise lockfile.AlreadyLocked()
        scenario['locking_pid'] = scenario['pid']
    def mock_release():
        if (scenario['locking_pid'] is None):
            raise lockfile.NotLocked()
        if (scenario['locking_pid'] != scenario['pid']):
            raise lockfile.NotMyLock()
        scenario['locking_pid'] = None
    def mock_break_lock():
        scenario['locking_pid'] = None
    for func_name in ['read_pid', 'is_locked', 'i_am_locking', 'acquire', 'release', 'break_lock']:
        mock_func = vars()[('mock_%(func_name)s' % vars())]
        lockfile_func_name = ('%(class_name)s.%(func_name)s' % vars())
        mock_lockfile_func = scaffold.Mock(lockfile_func_name, returns_func=mock_func, tracker=testcase.mock_tracker)
        try:
            scaffold.mock(lockfile_func_name, mock_obj=mock_lockfile_func, tracker=testcase.mock_tracker)
        except NameError:
            pass

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def setup_lockfile_method_mocks(testcase, scenario, class_name):