How to use the niscope._visatype function in niscope

def __init__(self, expected_value):
        _ScalarMatcher.__init__(self, _visatype.ViUInt32, expected_value)

import niscope._visatype


# This class is an internal implementation detail
# ctypes definition
# Name must match exactly what the name of the structure type is named in the C API.
class struct_niScope_wfmInfo(ctypes.Structure):  # noqa N801
    _pack_ = 8
    _fields_ = [
        ('absolute_initial_x', niscope._visatype.ViReal64),
        ('relative_initial_x', niscope._visatype.ViReal64),
        ('x_increment', niscope._visatype.ViReal64),
        ('actual_samples', niscope._visatype.ViInt32),
        ('offset', niscope._visatype.ViReal64),
        ('gain', niscope._visatype.ViReal64),
        ('reserved1', niscope._visatype.ViReal64),
        ('reserved2', niscope._visatype.ViReal64),
    ]

    def __init__(self, data=None, absolute_initial_x=0.0, relative_initial_x=0.0,
                 x_increment=0.0, actual_samples=0, offset=0.0, gain=0.0,
                 reserved1=0.0, reserved2=0.0):
        super(ctypes.Structure, self).__init__()
        if data is not None:
            self.absolute_initial_x = data.absolute_initial_x
            self.relative_initial_x = data.relative_initial_x
            self.x_increment = data.x_increment
            self.actual_samples = data.actual_samples
            self.offset = data.offset
            self.gain = data.gain
            self.reserved1 = data.reserved1