class_docstr: An abstract base class for a proximal operator
  
  Parameters
  ----------
  range : `tuple` of two `int`, default=`None`
      Range on which the prox is applied
  
  Attributes
  ----------
  dtype : `{'float64', 'float32'}`
      Type of the arrays used.
code: def value(self, coeffs: np.ndarray) -> float:
      pass
  
file_path: tick/tick/prox/base/prox.py
imports: import numpy
  from abc import ABC, abstractmethod
  from tick.base import Base
label_desc: Use image node_id 6 for calling the Prox obj's underlying member method code with example usage: obj.value(coeffs) without return types