docstr: Given a dataset object and data in the appropriate format for
  the interface, return a simple scalar.
docstr_tok: ["Given","a","dataset","object","and","data","in","the","appropriate","format","for","the","interface",",","return","a","simple","scalar","."]
code: def unpack_scalar(cls, dataset, data):
      """
      Given a dataset object and data in the appropriate format for
      the interface, return a simple scalar.
      """
      if len(data) != 1 or len(data.columns) > 1:
          return data
      return data.iat[0, 0]
  
imports: import numpy
  import pandas
  from packaging.version import Version
  from pandas.api.types import is_numeric_dtype
  from ..None import util
  from ..dimension import Dimension, dimension_name
  from ..element import Element
  from ..ndmapping import NdMapping, item_check, sorted_context
  from .interface import DataError, Interface
  from .util import finite_range
label_desc: Use image node_id 10 for calling the PandasInterface obj's underlying member method code with example usage: obj.unpack_scalar(cls, dataset, data) and returns: data, data