Import Error after Update

Software
,
1

We have been on 24.4.11 for a long time (mainly because we had students working with the system).
However, with the new version, I am encountering some import errors due to changes in pioreactor.strucs

“ImportError: cannot import name ‘PumpCalibration’ from ‘pioreactor.structs’”

Code snippet:

from pioreactor.structs import PumpCalibration
.
…
SlowPump = PumpCalibration(
name=“SlowCalibration”,
pioreactor_unit="testing",
created_at=“2024-01-01”,
pump=“”,
hz=180.0,
dc=25.0,
duration=1.0,
bias_=0,
voltage=-1,
)

I guess I have to use
“from pioreactor.structs import CalibrationBase“
but I’m not sure how to update the code.

The chemostat automation is almost the same as found here

2

Ah yes, we changed calibrations signifcantly in version 25.1.21. Try this code instead:

from pioreactor.structs import SimplePeristalticPumpCalibration

...

SlowPump = SimplePeristalticPumpCalibration(
    calibration_name="SlowCalibration",
    calibrated_on_pioreactor_unit="testing",
    created_at="2024-01-01",
    hz=180.0,
    dc=25.0,
    voltage=-1,
    curve_type="poly",
    curve_data_=[1.0, 0.0],
    recorded_data={"x": [], "y": []},
)

That might be the only change you need - but if you encounter more errors, feel feel to show the rest of the code, too.