truncate_value

lsst.ts.mtmount.truncate_value(value, min_value, max_value, descr)

Truncate a value, if necessary.

Returns:

A tuple:

• truncated_value: one of value, min_value, or max_value, as appropriate.

• message in format f”{descr} from {value:0.2f} to {truncated_value:0.2f}”

  or “” if the value is not truncated.

Raises:

ValueError

If min_value >= max_value.