docstr: we always want to get an index value, never a value 
code: def get_value(self, series, key):
      """we always want to get an index value, never a value"""
      if not is_scalar(key):
          raise InvalidIndexError
  
      k = com.values_from_object(key)
      loc = self.get_loc(k)
      new_values = com.values_from_object(series)[loc]
  
      return new_values
  
imports: import warnings
  import numpy
  from pandas._libs import index
  import pandas.compat
  from pandas.util._decorators import Appender, cache_readonly
  from pandas.core.dtypes.common import is_bool, is_bool_dtype, is_dtype_equal, is_extension_array_dtype, is_float, is_integer_dtype, is_scalar, needs_i8_conversion, pandas_dtype
  import pandas.core.dtypes.concat
  from pandas.core.dtypes.missing import isna
  from pandas.core import algorithms
  import pandas.core.common
  import pandas.core.indexes.base
  from pandas.core.indexes.base import Index, InvalidIndexError, _index_shared_docs
  from pandas.core.ops import get_op_result_name
label_desc: Use image node_id 6 for calling the Float64Index obj's underlying member method code with example usage: obj.get_value(series, key) and returns: new_values