docstr: Sets the value of either the percentage (if `type` is set to
  "percent") or the constant (if `type` is set to "constant")
  corresponding to the lengths of the error bars.
  
  The 'value' property is a number and may be specified as:
    - An int or float in the interval [0, inf]
  
  Returns
  -------
  int|float
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code: def value(self):
      """
      Sets the value of either the percentage (if `type` is set to
      "percent") or the constant (if `type` is set to "constant")
      corresponding to the lengths of the error bars.
  
      The 'value' property is a number and may be specified as:
        - An int or float in the interval [0, inf]
  
      Returns
      -------
      int|float
      """
      return self["value"]
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 23 for calling the ErrorY obj's underlying member method code with example usage: obj.value() and returns: self