code: def from_molfile(cls, molfile, data=None):
          
          if not data:
              data = OrderedDict()
  
          if not isinstance(molfile, Molfile):
              raise ValueError('Not a Molfile type: "{}"'.format(type(molfile)))
  
          if not isinstance(data, dict):
              raise ValueError('Not a dict type: "{}"'.format(type(data)))
  
          sdfile = cls()
          sdfile['1'] = OrderedDict()
          sdfile['1']['molfile'] = molfile
          sdfile['1']['data'] = data
          return sdfile
docs: Construct new ``SDfile`` object from ``Molfile`` object.
  
          :param molfile: ``Molfile`` object.
          :type molfile: :class:`~ctfile.ctfile.Molfile`.
          :return: ``SDfile`` object.
          :rtype: :class:`~ctfile.ctfile.SDfile`.