class_docstr: Helper class to replace the placeholder once value is collected. 
docstr: Store placeholders value collected. 
docstr_tok: ["Store","placeholders","value","collected","."]
code: def __init__(self, placeholders):
      """Store placeholders value collected."""
      self.placeholders = placeholders
      super(PlaceholderReplace, self).__init__()
  
imports: from pythran.conversion import mangle
  from pythran.analyses import Check, Placeholder, AST_or
  from pythran.passmanager import Transformation
  from copy import deepcopy
  import gast
  from inspect import isclass
label_desc: Use image node_id 1 to create a new PlaceholderReplace object from inherited base classes: Transformation with example: obj = PlaceholderReplace(placeholders)