class_docstr: An operation that represents extracting values from a dictionary.
  
  This operation represents a `beam.ParDo` that is applied to a PCollection
  whose elements are assumed to be a dictionary of values.  For each element of
  the PCollection, this corresponding element of the output PCollection is a
  tuple of values, one for each key.
  
  Attributes:
    keys: The keys whose values should be extracted from each element of the
        input PCollection. keys should either be a tuple or a string.
    label: A unique label for this operation.
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code: def is_partitionable(self):
      return True
  
imports: import tensorflow
  from tensorflow_transform import nodes
  from tfx_bsl.types import tfx_namedtuple
label_desc: Use image node_id 1 for calling the ExtractFromDict obj's underlying member method code with example usage: obj.is_partitionable() and returns: True