code: def convert_inputs_to_sparse_if_necessary(lhs, rhs):
      '''
      This function checks to see if a sparse output is desireable given the inputs and if so, casts the inputs to sparse in order to make it so.
      '''
      if not sp.issparse(lhs) or not sp.issparse(rhs):
          if sparse_is_desireable(lhs, rhs):
              if not sp.issparse(lhs):
                  lhs = sp.csc_matrix(lhs)
                  #print "converting lhs into sparse matrix"
              if not sp.issparse(rhs):
                  rhs = sp.csc_matrix(rhs)
                  #print "converting rhs into sparse matrix"
      return lhs, rhf convert_inputs_to_sparse_if_necessary(lhs, rhs):
      '''
      This function checks to see if a sparse output is desireable given the inputs and if so, casts the inputs to sparse in order to make it so.
      '''
      if not sp.issparse(lhs) or not sp.issparse(rhs):
          if sparse_is_desireable(lhs, rhs):
              if not sp.issparse(lhs):
                  lhs = sp.csc_matrix(lhs)
                  #print "converting lhs into sparse matrix"
              if not sp.issparse(rhs):
                  rhs = sp.csc_matrix(rhs)
                  #print "converting rhs into sparse matrix"
      return lhs, rhs
docs: This function checks to see if a sparse output is desireable given the inputs and if so, casts the inputs to sparse in order to make it so.