class_docstr: IdentityRegion is designed to implement a dummy region that returns the input
  as the output.
code: def __init__(self, dataWidth):
      if dataWidth <= 0:
          raise ValueError("Parameter dataWidth must be > 0")
      self._dataWidth = dataWidth
  
file_path: nupic-legacy/examples/network/custom_region/identity_region.py
imports: from nupic.bindings.regions.PyRegion import PyRegion
label_desc: Use image node_id 1 to create a new IdentityRegion object from inherited base classes: PyRegion with example: obj = IdentityRegion(dataWidth)