code: def index_last(ol,value):
      '''
          from elist.elist import *
          ol = [1,'a',3,'a',4,'a',5]
          index_last(ol,'a')
          ####lastIndexOf is the same as index_last
          lastIndexOf(ol,'a')
      '''
      length = ol.__len__()
      for i in range(length-1,-1,-1):
          if(value == ol[i]):
              return(i)
          else:
              pass
      return(Nonef index_last(ol,value):
      '''
          from elist.elist import *
          ol = [1,'a',3,'a',4,'a',5]
          index_last(ol,'a')
          ####lastIndexOf is the same as index_last
          lastIndexOf(ol,'a')
      '''
      length = ol.__len__()
      for i in range(length-1,-1,-1):
          if(value == ol[i]):
              return(i)
          else:
              pass
      return(None)
docs: from elist.elist import *
          ol = [1,'a',3,'a',4,'a',5]
          index_last(ol,'a')
          ####lastIndexOf is the same as index_last
          lastIndexOf(ol,'a')