Enough changes to make allmydata.test.test_storage run on Python 3.

Still lots of failures, of course.

src/allmydata/dirnode.py

@@ -1,4 +1,6 @@
 """Directory Node implementation."""
+from past.builtins import unicode
+
 import time
 
 from zope.interface import implementer
@@ -227,7 +229,7 @@ def pack_children(childrenx, writekey, deep_immutable=False):
     return _pack_normalized_children(children, writekey=writekey, deep_immutable=deep_immutable)
 
 
-ZERO_LEN_NETSTR=netstring('')
+ZERO_LEN_NETSTR=netstring(b'')
 def _pack_normalized_children(children, writekey, deep_immutable=False):
     """Take a dict that maps:
          children[unicode_nfc_name] = (IFileSystemNode, metadata_dict)

src/allmydata/immutable/downloader/fetcher.py

@@ -4,7 +4,7 @@ from foolscap.api import eventually
 from allmydata.interfaces import NotEnoughSharesError, NoSharesError
 from allmydata.util import log
 from allmydata.util.dictutil import DictOfSets
-from common import OVERDUE, COMPLETE, CORRUPT, DEAD, BADSEGNUM, \
+from .common import OVERDUE, COMPLETE, CORRUPT, DEAD, BADSEGNUM, \
      BadSegmentNumberError
 
 class SegmentFetcher(object):

src/allmydata/immutable/downloader/finder.py

@@ -5,7 +5,7 @@ from foolscap.api import eventually
 from allmydata.util import base32, log
 from twisted.internet import reactor
 
-from share import Share, CommonShare
+from .share import Share, CommonShare
 
 def incidentally(res, f, *args, **kwargs):
     """Add me to a Deferred chain like this:

src/allmydata/immutable/downloader/node.py

@@ -13,10 +13,10 @@ from allmydata.hashtree import IncompleteHashTree, BadHashError, \
      NotEnoughHashesError
 
 # local imports
-from finder import ShareFinder
-from fetcher import SegmentFetcher
-from segmentation import Segmentation
-from common import BadCiphertextHashError
+from .finder import ShareFinder
+from .fetcher import SegmentFetcher
+from .segmentation import Segmentation
+from .common import BadCiphertextHashError
 
 class IDownloadStatusHandlingConsumer(Interface):
     def set_download_status_read_event(read_ev):

src/allmydata/immutable/downloader/segmentation.py

@@ -9,7 +9,7 @@ from allmydata.util import log
 from allmydata.util.spans import overlap
 from allmydata.interfaces import DownloadStopped
 
-from common import BadSegmentNumberError, WrongSegmentError
+from .common import BadSegmentNumberError, WrongSegmentError
 
 @implementer(IPushProducer)
 class Segmentation(object):

src/allmydata/immutable/downloader/share.py

@@ -13,7 +13,7 @@ from allmydata.hashtree import IncompleteHashTree, BadHashError, \
 
 from allmydata.immutable.layout import make_write_bucket_proxy
 from allmydata.util.observer import EventStreamObserver
-from common import COMPLETE, CORRUPT, DEAD, BADSEGNUM
+from .common import COMPLETE, CORRUPT, DEAD, BADSEGNUM
 
 
 class LayoutInvalid(Exception):

src/allmydata/node.py

@@ -2,6 +2,8 @@
 This module contains classes and functions to implement and manage
 a node for Tahoe-LAFS.
 """
+from past.builtins import unicode
+
 import datetime
 import os.path
 import re
@@ -70,7 +72,7 @@ def _common_valid_config():
 
 # Add our application versions to the data that Foolscap's LogPublisher
 # reports.
-for thing, things_version in get_package_versions().iteritems():
+for thing, things_version in get_package_versions().items():
     app_versions.add_version(thing, str(things_version))
 
 # group 1 will be addr (dotted quad string), group 3 if any will be portnum (string)
@@ -275,7 +277,10 @@ class _Config(object):
         self.config = configparser
 
         nickname_utf8 = self.get_config("node", "nickname", "<unspecified>")
-        self.nickname = nickname_utf8.decode("utf-8")
+        if isinstance(nickname_utf8, bytes):  # Python 2
+            self.nickname = nickname_utf8.decode("utf-8")
+        else:
+            self.nickname = nickname_utf8
         assert type(self.nickname) is unicode
 
     def validate(self, valid_config_sections):

src/allmydata/test/eliotutil.py

@@ -2,6 +2,8 @@
 Tools aimed at the interaction between tests and Eliot.
 """
 
+from past.builtins import unicode
+
 __all__ = [
     "RUN_TEST",
     "EliotLoggedRunTest",