def open_unit(self, serial=None, resolution=None):
"""optional arguments:
serial: If no serial number is provided, this function opens the first device discovered.
resolution: for some devices, you may specify a resolution as you open the device. You should retrieve this
numeric constant from the relevant driver module.
returns: a Device instance, which has functions on it for collecting data and using the waveform generator (if
present).
Note: Either use this object in a context manager, or manually call .close() on it when you are finished."""
return Device(self, self._python_open_unit(serial=serial, resolution=resolution))
def test_invalid_config(self):
request = TimebaseOptions(max_time_interval=0.005,
no_of_samples=None,
min_collection_time=1.)
actual_timebase = 0.004
required_max_samples = int(
math.ceil(request.min_collection_time / actual_timebase))
response = TimebaseInfo(timebase_id=7,
time_interval=0.004,
time_units=None,
max_samples=required_max_samples - 5,
segment_id=0)
self.assertFalse(Device._validate_timebase(request, response))