IndexError from parameter model (.ini) file when compute B sensing path

To investigate DAC-driven measurement model, we try some special cases. For example, TIA or whitening bypass measurement. When omc_meas_p_trans_amplifier_uncompensated or omc_meas_p_whitening_uncompensated_mode1 assignment is empty and try to compute "B" sensing path, the error "IndexError: list index out of range" appears.

For example if omc_meas_p_trans_amplifier_uncompensated is empty:

omc_meas_p_trans_amplifier_uncompensated =

in H1_20190416.ini. Then compute B path

C.omc_path_response('B',freq)

The error is following:

Traceback (most recent call last):
  File "/home/hsiang-yu.huang/test/test.py", line 9, in <module>
    a = C.omc_path_response('B',freq)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hsiang-yu.huang/pydarm/pydarm/sensing.py", line 421, in omc_path_response
    analog_readout_response = self.omc_analog_dcpd_readout_response(
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hsiang-yu.huang/pydarm/pydarm/sensing.py", line 295, in omc_analog_dcpd_readout_response
    self.omc_dcpd_transimpedence_amplifier_response(name, frequencies))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hsiang-yu.huang/pydarm/pydarm/sensing.py", line 141, in omc_dcpd_transimpedence_amplifier_response
    self.omc_meas_p_trans_amplifier_uncompensated[idx])
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
IndexError: list index out of range

On the other hand, if omc_meas_p_whitening_uncompensated_mode1 is empty:

Traceback (most recent call last):
  File "/home/hsiang-yu.huang/test/test.py", line 9, in <module>
    a = C.omc_path_response('B',freq)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hsiang-yu.huang/pydarm/pydarm/sensing.py", line 421, in omc_path_response
    analog_readout_response = self.omc_analog_dcpd_readout_response(
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hsiang-yu.huang/pydarm/pydarm/sensing.py", line 299, in omc_analog_dcpd_readout_response
    self.omc_dcpd_whitening_response(name, frequencies))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hsiang-yu.huang/pydarm/pydarm/sensing.py", line 231, in omc_dcpd_whitening_response
    meas_p_whitening = np.asarray(poles[idx])
                                  ~~~~~^^^^^
IndexError: list index out of range