class_docstr: Base Class for series
docstr: Returns the i'th point of a series
  If start point is negative infinity, point is returned from the end.
  Assumes the first point to be indexed zero.
  
  Examples
  ========
  
  TODO
docstr_tok: ["Returns","the","i'th","point","of","a","series","If","start","point","is","negative","infinity",",","point","is","returned","from","the","end",".","Assumes","the","first","point","to","be","indexed","zero",".","Examples","========","TODO"]
code: def _ith_point(self, i):
      """
      Returns the i'th point of a series
      If start point is negative infinity, point is returned from the end.
      Assumes the first point to be indexed zero.
  
      Examples
      ========
  
      TODO
      """
      if self.start is S.NegativeInfinity:
          initial = self.stop
          step = -1
      else:
          initial = self.start
          step = 1
  
      return initial + i * step
  
file_path: sympy/sympy/series/series_class.py
imports: from sympy.core.expr import Expr
  from sympy.core.singleton import S
  from sympy.core.cache import cacheit
label_desc: Use image node_id 9 for calling the SeriesBase obj's underlying member method code with example usage: obj._ith_point(i) and returns: unknown