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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def feedback_results_to_measurements_frame(feedback_result):
    '''
    Extract measured data from `FeedbackResults` instance into
    `pandas.DataFrame`.
    '''
    index = pd.Index(feedback_result.time * 1e-3, name='seconds')
    df_feedback = pd.DataFrame(np.column_stack([feedback_result.V_fb,
                                                feedback_result.V_hv,
                                                feedback_result.fb_resistor,
                                                feedback_result.hv_resistor]),
                               columns=['V_fb', 'V_hv', 'fb_resistor',
                                        'hv_resistor'],
                               index=index)
    df_feedback.insert(0, 'frequency', feedback_result.frequency)
    return df_feedback