code: def isscalar(cls, dataset, dim):
      name = dataset.get_dimension(dim, strict=True).name
      return len(dataset.data[name].unique()) == 1
  
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 3 for calling the PandasInterface obj's underlying member method code with example usage: obj.isscalar(cls, dataset, dim) and returns: unknown