1231 def R(seqn):  argument
1233     for i in seqn:
1238     def __init__(self, seqn):  argument
1239         self.seqn = seqn
1241         return self.seqn[i]
1245     def __init__(self, seqn):  argument
1246         self.seqn = seqn
1251         if self.i >= len(self.seqn): raise StopIteration
1252         v = self.seqn[self.i]
1258     def __init__(self, seqn):  argument
1259         self.seqn = seqn
1262         for val in self.seqn:
1267     def __init__(self, seqn):  argument
1268         self.seqn = seqn
1271         if self.i >= len(self.seqn): raise StopIteration
1272         v = self.seqn[self.i]
1278     def __init__(self, seqn):  argument
1279         self.seqn = seqn
1286     def __init__(self, seqn):  argument
1287         self.seqn = seqn
1296     def __init__(self, seqn):  argument
1303 def L(seqn):  argument
1305     return chain(imap(lambda x:x, R(Ig(G(seqn)))))