[Python3] pf.parse fails when data is a bytes object

[zachriggle]

It looks like pfp does not like being given bytes-like objects on Python3.

>>> template='uchar mybyte;'
>>> pfp.parse('a', template)
<pfp.fields.Dom object at 0x10fbdab50>

However...

>>> pfp.parse(b'a', template)

Throws the following error:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
~/github.com/pfp/pfp/interp.py in _run(self, keep_successfull)
   1043             # may change (e.g. compressed data)
-> 1044             res = self._handle_node(self._ast, None, None, self._stream)
   1045         except errors.InterpReturn as e:

~/github.com/pfp/pfp/interp.py in _handle_node(self, node, scope, ctxt, stream)
   1152
-> 1153         res = self._node_switch[node.__class__](node, scope, ctxt, stream)
   1154

~/github.com/pfp/pfp/interp.py in _handle_file_ast(self, node, scope, ctxt, stream)
   1168         """
-> 1169         self._root = ctxt = fields.Dom(stream)
   1170         ctxt._pfp__scope = scope

~/github.com/pfp/pfp/fields.py in __init__(self, *args, **kwargs)
   1217     def __init__(self, *args, **kwargs):
-> 1218         super(self.__class__, self).__init__(*args, **kwargs)
   1219

~/github.com/pfp/pfp/fields.py in __init__(self, stream, metadata_processor)
    772         if stream is not None:
--> 773             self._pfp__offset = stream.tell()
    774

~/github.com/pfp/pfp/bitwrap.py in tell(self)
    191         """
--> 192         res = self._stream.tell()
    193         if len(self._bits) > 0:

AttributeError: 'bytes' object has no attribute 'tell'

[d0c-s4vage]

Oh interesting, thank you for the bug report! I thought I had addressed all Python 3 compatability issues already.

[tostercx]

A workaround - pass io.BytesIO(bytes) as data