code: def __add__(self, other):
      if isinstance(other, Interval):
          return UNKNOWN_TUPLE_RANGE
      return IntervalTuple(self.values + other.values)
  
imports: from math import isinf, isnan
  import itertools
  import numpy
label_desc: Use image node_id 8 for calling the IntervalTuple obj's underlying member method code with example usage: obj.__add__(other) and returns: IntervalTuple, UNKNOWN_TUPLE_RANGE