code: def _get_conversion_outfile(self, convert_to=None):
          '''a helper function to return a conversion temporary output file
             based on kind of conversion
  
             Parameters
             ==========
             convert_to: a string either docker or singularity, if a different
  
          '''
          conversion = self._get_conversion_type(convert_to)
          prefix = "Singularity"
          if conversion == "docker":
              prefix = "Dockerfile"
          suffix = next(tempfile._get_candidate_names())
          return "%s.%s" %(prefix, suffixf _get_conversion_outfile(self, convert_to=None):
          '''a helper function to return a conversion temporary output file
             based on kind of conversion
  
             Parameters
             ==========
             convert_to: a string either docker or singularity, if a different
  
          '''
          conversion = self._get_conversion_type(convert_to)
          prefix = "Singularity"
          if conversion == "docker":
              prefix = "Dockerfile"
          suffix = next(tempfile._get_candidate_names())
          return "%s.%s" %(prefix, suffix)
docs: a helper function to return a conversion temporary output file
             based on kind of conversion
  
             Parameters
             ==========
             convert_to: a string either docker or singularity, if a different