python - BadValueError: Expected list or tuple, got None -

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I try to clear a ndb.StringProperty (repeated = true) from the settings I am not any , but the error is happening:

Badwali error: expected list or tubal, none found

This is very straightforward, but the code I'm using is: 

  g.kids_names = none g.put ()
< / Div>

this is a duplicated property, it is empty Try setting Uchi: []


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