<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reset(self):
 """Reset widget to original state."""

        self.filename = None
        self.dataset = None

        # about the recordings
        self.idx_filename.setText('Open Recordings...')
        self.idx_s_freq.setText('')
        self.idx_n_chan.setText('')
        self.idx_start_time.setText('')
        self.idx_end_time.setText('')

        # about the visualization
        self.idx_scaling.setText('')
        self.idx_distance.setText('')
        self.idx_length.setText('')
        self.idx_start.setText('')