Using sensors as an example I learned that I could delete a sensor with

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sensors.deleteBean(s,"DoDelete")

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However I saw that it would be better to check for listeners before doing this and that

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sensors.deleteBeans(s,"CanDelete")

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might do the job. However I get a bunch of errors starting with

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javax.script.ScriptException: java.beans.PropertyVetoException: java.beans.PropertyVetoException: Found in the following <b>Blocks</b><ul><li>IB10</li></ul>It will be removed from the Blocks<hr> in <script> at line number 4

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It seems like I should be able to handle the exception but I don't know how.

Guess I need something like this:

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import java.beans

...

try:
? ? sensors.deleteBean(s,"CanDelete")
? ? sensors.deleteBean(s,"DoDelete")
except java.beans.PropertyVetoException, e:
? ? print("exception thrown")

#? parse e and decide what to do

...