class_docstr: Objects of this class can be passed to Plotly Express functions that expect column
  identifiers or list-like objects to indicate that this attribute should take on a
  constant value. An optional label can be provided.
class_docstr_tok: ["Objects","of","this","class","can","be","passed","to","Plotly","Express","functions","that","expect","column","identifiers","or","list-like","objects","to","indicate","that","this","attribute","should","take","on","a","constant","value",".","An","optional","label","can","be","provided","."]
code: def __init__(self, value, label=None):
      self.value = value
      self.label = label
  
file_path: catboost/contrib/python/plotly/py3/plotly/express/_special_inputs.py
label_desc: Use image node_id 1 to create a new Constant object from inherited base classes: object with example: obj = Constant(value, label)