parameters: (self, value)
docstring: Ensure that if we don't have an index, that we can create one from the
          passed value.
docstring_summary: Ensure that if we don't have an index, that we can create one from the
          passed value.
docstring_tokens: Ensure that if we don t have an index that we can create one from the passed value .
function: def _ensure_valid_index(self, value):
          """
          Ensure that if we don't have an index, that we can create one from the
          passed value.
          """
          # GH5632, make sure that we are a Series convertible
          if not len(self.index) and is_list_like(value) and len(value):
              try:
                  value = Series(value)
              except (ValueError, NotImplementedError, TypeError):
                  raise ValueError(
                      "Cannot set a frame with no defined index "
                      "and a value that cannot be converted to a "
                      "Series"
                  )
  
              self._data = self._data.reindex_axis(
                  value.index.copy(), axis=1, fill_value=np.nan
              )
function_tokens: def _ensure_valid_index ( self , value ) : # GH5632, make sure that we are a Series convertible if not len ( self . index ) and is_list_like ( value ) and len ( value ) : try : value = Series ( value ) except ( ValueError , NotImplementedError , TypeError ) : raise ValueError ( "Cannot set a frame with no defined index " "and a value that cannot be converted to a " "Series" ) self . _data = self . _data . reindex_axis ( value . index . copy ( ) , axis = 1 , fill_value = np . nan )