A while back, in working on a cross-version python decompiler, I used PyPy's lib_pypy/_marshal.py. Recently in doing work in writing a cross-platform a Python bytecode assember, I noticed what is in the py3.5 branch is a bit out of date for Python 3. Specifically these types: TYPE_REF = 'r' # Since 3.4 TYPE_ASCII = 'a' # since 3.4 TYPE_ASCII_INTERNED = 'A' # since 3.4 TYPE_SMALL_TUPLE = ')' # since 3.4 TYPE_SHORT_ASCII = 'z' # since 3.4 TYPE_SHORT_ASCII_INTERNED = 'Z' # since 3.4 In xdis, the cross-version marshal/unmarshal and opcode routines, I've started adding some of these. Is lib_pypy/_marshal.py used? If so, shouldn't this be corrected?