class_docstr: Prevents parameter shadowing by creating new variable.
  
  >>> import gast as ast
  >>> from pythran import passmanager, backend
  >>> node = ast.parse("def foo(a): a = 1")
  >>> pm = passmanager.PassManager("test")
  >>> _, node = pm.apply(UnshadowParameters, node)
  >>> print(pm.dump(backend.Python, node))
  def foo(a):
      a_ = a
      a_ = 1
class_docstr_tok: ["Prevents","parameter","shadowing","by","creating","new","variable",".",">",">",">","import","gast","as","ast",">",">",">","from","pythran","import","passmanager",",","backend",">",">",">","node","=","ast.parse","(","``","def","foo","(","a",")",":","a","=","1","''",")",">",">",">","pm","=","passmanager.PassManager","(","``","test","''",")",">",">",">","_",",","node","=","pm.apply","(","UnshadowParameters",",","node",")",">",">",">","print","(","pm.dump","(","backend.Python",",","node",")",")","def","foo","(","a",")",":","a_","=","a","a_","=","1"]
code: def visit_AugAssign(self, node):
      self.update_name(node.target)
      return self.generic_visit(node)
  
file_path: pythran/pythran/transformations/unshadow_parameters.py
imports: from pythran.analyses import Identifiers
  from pythran.passmanager import Transformation
  import gast
label_desc: Use image node_id 5 for calling the UnshadowParameters obj's underlying member method code with example usage: obj.visit_AugAssign(node) and returns: self