text: 
  __all__ = ['POS']
  
  from .base import ArithmeticHead
  
  def init_module(m):
      from .base import heads
      for n,h in heads.iterNameValue(): setattr(m, n, h)
  
  class PosHead(ArithmeticHead):
  
      """
      PosHead represents positive unary operation where operand (data)
      is an expression.
      """
  
      op_mth = '__pos__'
          
      def __repr__(self): return 'POS'
  
      def data_to_str_and_precedence(self, cls, expr):
          return expr.head.data_to_str_and_precedence(cls, expr.data)
  
      def to_lowlevel(self, cls, data, pair):
          return data
  
  POS = PosHead()
  