code: def visit_For(self, node):
          '''
          For loop creates aliasing between the target
          and the content of the iterator
  
          >>> from pythran import passmanager
          >>> pm = passmanager.PassManager('demo')
          >>> module = ast.parse()
          >>> result = pm.gather(Aliases, module)
          >>> Aliases.dump(result, filter=ast.Set)
          {i} => ['|i|']
  
          Not very useful, unless we know something about the iterated container
  
          >>> module = ast.parse("""
          ... def foo(a, b):
          ...     for i in [a, b]:
          ...         {i}""")
          >>> result = pm.gather(Aliases, module)
          >>> Aliases.dump(result, filter=ast.Set)
          {i} => ['|a|', '|b|']
          '''
  
          iter_aliases = self.visit(node.iter)
          if all(isinstance(x, ContainerOf) for x in iter_aliases):
              target_aliases = set()
              for iter_alias in iter_aliases:
                  target_aliases.add(iter_alias.containee)
          else:
              target_aliases = {node.target}
  
          self.add(node.target, target_aliases)
          self.aliases[node.target.id] = self.result[node.target]
  
          self.generic_visit(node)
          self.generic_visit(node)
docs: For loop creates aliasing between the target
          and the content of the iterator
  
          >>> from pythran import passmanager
          >>> pm = passmanager.PassManager('demo')
          >>> module = ast.parse("""
          ... def foo(a):
          ...     for i in a:
          ...         {i}""")
          >>> result = pm.gather(Aliases, module)
          >>> Aliases.dump(result, filter=ast.Set)
          {i} => ['|i|']
  
          Not very useful, unless we know something about the iterated container
  
          >>> module = ast.parse("""
          ... def foo(a, b):
          ...     for i in [a, b]:
          ...         {i}""")
          >>> result = pm.gather(Aliases, module)
          >>> Aliases.dump(result, filter=ast.Set)
          {i} => ['|a|', '|b|']