old_contents: from pyscalambda.operands import Underscore
  
  from pyscalambda.quote import quote
  
  from pyscalambda.scalambdable import scalambdable_func
  
  _ = Underscore(0)
  _1 = Underscore(1)
  _2 = Underscore(2)
  _3 = Underscore(3)
  _4 = Underscore(4)
  _5 = Underscore(5)
  _6 = Underscore(6)
  _7 = Underscore(7)
  _8 = Underscore(8)
  _9 = Underscore(9)
  SF = scalambdable_func
  Q = quote
  
  __all__ = ("_", "_1", "_2", "_3", "_4", "_5", "_6", "_7", "_8", "_9", "SF",)
  
new_contents: from pyscalambda.operands import Underscore
  
  from pyscalambda.quote import quote
  
  from pyscalambda.scalambdable import scalambdable_func
  
  _ = Underscore(0)
  _1 = Underscore(1)
  _2 = Underscore(2)
  _3 = Underscore(3)
  _4 = Underscore(4)
  _5 = Underscore(5)
  _6 = Underscore(6)
  _7 = Underscore(7)
  _8 = Underscore(8)
  _9 = Underscore(9)
  SF = scalambdable_func
  Q = quote
  
  __all__ = ("_", "_1", "_2", "_3", "_4", "_5", "_6", "_7", "_8", "_9", "SF", "Q")
  
subject: add __all__