google.appengine.api.validation.TYPE_UNICODE

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Verifies property is of expected type.

google.appengine.api.validation.TYPE_UNICODE(
    value, key='???'
)

Can optionally convert value if it is not of the expected type.

It is possible to specify a required field of a specific type in shorthand by merely providing the type. This method is slightly less efficient than providing an explicit type but is not significant unless parsing a large amount of information:

  class Person(Validated):
    ATTRIBUTES = {'name': unicode,
                  'age': int,
                  }

However, in most instances it is best to use the type constants:

  class Person(Validated):
    ATTRIBUTES = {'name': TypeUnicode,
                  'age': TypeInt,
                  }