docs: def calc_tr(calc_fn, *args, **kwargs):
      '''
      calc_tr(calc_fn, ...) yields a copy of calc_fn in which the afferent and efferent values of the
        function have been translated. The translation is found from merging the list of 0 or more
        dictionary arguments given left-to-right followed by the keyword arguments. If the calc_fn
        that is given is not a @calc function explicitly, calc_tr will attempt to coerce it to one.
      '''
      if not is_calc(calc_fn):
          calc_fn = calc(calc_fn)
      return calc_fn.tr(*args, **kwargs)