A few classes that contain DAQmx attributes are missing slots declarations. This can cause confusion if a user typo's one of our attribute names and then nothing useful happens.
For example, this code doesn't do what you expect, because the attribute is called samp_quant_samp_per_chan even though the cfg_implicit_timing function variable name is samps_per_chan for the same setting. Fun!
with nidaqmx.Task() as co_task:
co_task.co_channels.add_co_pulse_chan_freq("Dev1/ctr0", freq=10000, duty_cycle=0.5)
co_task.co_channels.all.co_pulse_term = ""
co_task.timing.cfg_implicit_timing(sample_mode=nidaqmx.constants.AcquisitionType.FINITE, samps_per_chan=256)
for i in range(0, 100):
number_of_samples = random.randint(2, 256)
# Update the CO task
co_task.timing.samps_per_chan = number_of_samples # <-- THIS IS DOING NOTHING!
print(f"Number of samples: {co_task.timing.samps_per_chan}")
co_task.start()
co_task.wait_until_done()
co_task.stop()Templates that have attributes that don't have slots (bad!):
There are some iffy ones... e.g., collections don't have properties, only functions. But maybe they should have slots not to confuse people? idk. https://github.com/ni/nidaqmx-python/blob/master/src/codegen/templates/task/collections/_ai_channel_collection.py.mako. I think starting with that list above is good enough for now.
Note: this was create in response to an internal issue: Bug 2924340: Setting non-existent attribute on the CO timing does not cause assertion in python
A few classes that contain DAQmx attributes are missing slots declarations. This can cause confusion if a user typo's one of our attribute names and then nothing useful happens.
For example, this code doesn't do what you expect, because the attribute is called
samp_quant_samp_per_chaneven though thecfg_implicit_timingfunction variable name issamps_per_chanfor the same setting. Fun!Templates that have attributes that don't have slots (bad!):
There are some iffy ones... e.g., collections don't have properties, only functions. But maybe they should have slots not to confuse people? idk. https://github.com/ni/nidaqmx-python/blob/master/src/codegen/templates/task/collections/_ai_channel_collection.py.mako. I think starting with that list above is good enough for now.
Note: this was create in response to an internal issue: Bug 2924340: Setting non-existent attribute on the CO timing does not cause assertion in python