code: def match(self, other):
          
  
          if len(self) != len(other):
              raise ValueError()
          for s1, s2 in zip(self, other):
              i = s2.position - s1.position
              if i < 0:
                  return False
              n = len(s1)
              while i+n > len(s2) and s1[n-1] == syntax.BLANK:
                  n -= 1
              if s2.values[i:i+n] != s1.values[:n]:
                  return False
          return True
docs: Returns true iff self (as a pattern) matches other (as a
          configuration). Note that this is asymmetric: other is allowed
          to have symbols that aren't found in self.