<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def enter_root(self, root):
        '''
        Set self.focus for kwarg queries
        '''
        # There is no collision protection on root name isolation
        if root:
            self.result[root] = self.focus = {}
        else:
            self.focus = self.result