class_docstr: Exception to be raised whenever an interval cannot be computed.
class_docstr_tok: ["Exception","to","be","raised","whenever","an","interval","can","not","be","computed","."]
code: def __init__(self, value=None):
      if value is None:
          value = (
              "At least two beats must be present to be able to "
              "calculate an interval."
          )
      self.value = value
  
imports: from __future__ import absolute_import, division, print_function
  import warnings
  from functools import wraps
  import numpy
  from .None import MeanEvaluation, calc_absolute_errors, calc_errors, evaluation_io, find_closest_matches
  from .onsets import OnsetEvaluation
label_desc: Use image node_id 1 to create a new BeatIntervalError object from inherited base classes: Exception with example: obj = BeatIntervalError(value)