# HG changeset patch
# User Gregory Szorc <gregory.szorc@gmail.com>
# Date 2019-10-06 23:25:18
# Node ID 649d3ac37a12fb494233ba56ab10c8096afd717b
# Parent  74802979dd9d92250f5cdf0fd6994c6257025084

py3: define and use pycompat.iteritems() for hgext/

.iteritems() -> .items() is the last source transform being performed.
But it is also the most widely used.

This commit adds a pycompat.iteritems symbol and imports it in place
of .iteritems() for usage in hgext/. I chose to stop at just hgext/
because the patch will be large and it is an easy boundary to stop at
since we can disable source transformation on a per-package basis.

There are places where the type does implement items() and we could
call items() directly. However, this would require critical thought
and I thought it would be easier to just blindly change the code. We
know which call sites need to be audited in the future because they
have "pycompat.iteritems."

With this change, we no longer perform source transformation on
hgext!

Differential Revision: https://phab.mercurial-scm.org/D7014

diff --git a/hgext/absorb.py b/hgext/absorb.py
--- a/hgext/absorb.py
+++ b/hgext/absorb.py
@@ -726,7 +726,7 @@ class fixupstate(object):
 
     def apply(self):
         """apply fixups to individual filefixupstates"""
-        for path, state in self.fixupmap.iteritems():
+        for path, state in pycompat.iteritems(self.fixupmap):
             if self.ui.debugflag:
                 self.ui.write(_(b'applying fixups to %s\n') % path)
             state.apply()
@@ -736,7 +736,7 @@ class fixupstate(object):
         """-> {path: chunkstats}. collect chunkstats from filefixupstates"""
         return dict(
             (path, state.chunkstats)
-            for path, state in self.fixupmap.iteritems()
+            for path, state in pycompat.iteritems(self.fixupmap)
         )
 
     def commit(self):
@@ -755,7 +755,7 @@ class fixupstate(object):
         chunkstats = self.chunkstats
         if ui.verbose:
             # chunkstats for each file
-            for path, stat in chunkstats.iteritems():
+            for path, stat in pycompat.iteritems(chunkstats):
                 if stat[0]:
                     ui.write(
                         _(b'%s: %d of %d chunk(s) applied\n')
@@ -831,7 +831,7 @@ class fixupstate(object):
         repo = self.repo
         needupdate = [
             (name, self.replacemap[hsh])
-            for name, hsh in repo._bookmarks.iteritems()
+            for name, hsh in pycompat.iteritems(repo._bookmarks)
             if hsh in self.replacemap
         ]
         changes = []
@@ -890,7 +890,7 @@ class fixupstate(object):
         # ctx changes more files (not a subset of memworkingcopy)
         if not set(ctx.files()).issubset(set(memworkingcopy)):
             return False
-        for path, content in memworkingcopy.iteritems():
+        for path, content in pycompat.iteritems(memworkingcopy):
             if path not in pctx or path not in ctx:
                 return False
             fctx = ctx[path]
@@ -922,7 +922,7 @@ class fixupstate(object):
     def _cleanupoldcommits(self):
         replacements = {
             k: ([v] if v is not None else [])
-            for k, v in self.replacemap.iteritems()
+            for k, v in pycompat.iteritems(self.replacemap)
         }
         if replacements:
             scmutil.cleanupnodes(
@@ -968,7 +968,7 @@ def overlaydiffcontext(ctx, chunks):
         if not path or not info:
             continue
         patchmap[path].append(info)
-    for path, patches in patchmap.iteritems():
+    for path, patches in pycompat.iteritems(patchmap):
         if path not in ctx or not patches:
             continue
         patches.sort(reverse=True)
diff --git a/hgext/convert/bzr.py b/hgext/convert/bzr.py
--- a/hgext/convert/bzr.py
+++ b/hgext/convert/bzr.py
@@ -12,7 +12,11 @@ from __future__ import absolute_import
 import os
 
 from mercurial.i18n import _
-from mercurial import demandimport, error
+from mercurial import (
+    demandimport,
+    error,
+    pycompat,
+)
 from . import common
 
 # these do not work with demandimport, blacklist
@@ -195,7 +199,7 @@ class bzr_source(common.converter_source
             if not branch.supports_tags():
                 return {}
             tagdict = branch.tags.get_tag_dict()
-            for name, rev in tagdict.iteritems():
+            for name, rev in pycompat.iteritems(tagdict):
                 bytetags[self.recode(name)] = rev
         return bytetags
 
diff --git a/hgext/convert/common.py b/hgext/convert/common.py
--- a/hgext/convert/common.py
+++ b/hgext/convert/common.py
@@ -411,7 +411,7 @@ class commandline(object):
     def _cmdline(self, cmd, *args, **kwargs):
         kwargs = pycompat.byteskwargs(kwargs)
         cmdline = [self.command, cmd] + list(args)
-        for k, v in kwargs.iteritems():
+        for k, v in pycompat.iteritems(kwargs):
             if len(k) == 1:
                 cmdline.append(b'-' + k)
             else:
diff --git a/hgext/convert/convcmd.py b/hgext/convert/convcmd.py
--- a/hgext/convert/convcmd.py
+++ b/hgext/convert/convcmd.py
@@ -581,7 +581,7 @@ class converter(object):
                         # previous one so we don't end up with extra tag heads
                         tagsparents = [
                             e
-                            for e in self.map.iteritems()
+                            for e in pycompat.iteritems(self.map)
                             if e[1] == tagsparent
                         ]
                         if tagsparents:
diff --git a/hgext/convert/cvs.py b/hgext/convert/cvs.py
--- a/hgext/convert/cvs.py
+++ b/hgext/convert/cvs.py
@@ -19,6 +19,7 @@ from mercurial.pycompat import (
 from mercurial import (
     encoding,
     error,
+    pycompat,
     util,
 )
 from mercurial.utils import (
@@ -319,7 +320,7 @@ class convert_cvs(converter_source):
         if full:
             raise error.Abort(_(b"convert from cvs does not support --full"))
         self._parse()
-        return sorted(self.files[rev].iteritems()), {}, set()
+        return sorted(pycompat.iteritems(self.files[rev])), {}, set()
 
     def getcommit(self, rev):
         self._parse()
diff --git a/hgext/convert/cvsps.py b/hgext/convert/cvsps.py
--- a/hgext/convert/cvsps.py
+++ b/hgext/convert/cvsps.py
@@ -470,7 +470,7 @@ def createlog(ui, directory=None, root=b
 
             # find the branches starting from this revision
             branchpoints = set()
-            for branch, revision in branchmap.iteritems():
+            for branch, revision in pycompat.iteritems(branchmap):
                 revparts = tuple([int(i) for i in revision.split(b'.')])
                 if len(revparts) < 2:  # bad tags
                     continue
diff --git a/hgext/convert/filemap.py b/hgext/convert/filemap.py
--- a/hgext/convert/filemap.py
+++ b/hgext/convert/filemap.py
@@ -126,7 +126,7 @@ class filemapper(object):
         repo belong to the source repo and what parts don't."""
         if self.targetprefixes is None:
             self.targetprefixes = set()
-            for before, after in self.rename.iteritems():
+            for before, after in pycompat.iteritems(self.rename):
                 self.targetprefixes.add(after)
 
         # If "." is a target, then all target files are considered from the
diff --git a/hgext/convert/hg.py b/hgext/convert/hg.py
--- a/hgext/convert/hg.py
+++ b/hgext/convert/hg.py
@@ -34,6 +34,7 @@ from mercurial import (
     merge as mergemod,
     node as nodemod,
     phases,
+    pycompat,
     scmutil,
     util,
 )
@@ -133,7 +134,7 @@ class mercurial_sink(common.converter_si
 
         if missings:
             self.after()
-            for pbranch, heads in sorted(missings.iteritems()):
+            for pbranch, heads in sorted(pycompat.iteritems(missings)):
                 pbranchpath = os.path.join(self.path, pbranch)
                 prepo = hg.peer(self.ui, {}, pbranchpath)
                 self.ui.note(
@@ -227,7 +228,7 @@ class mercurial_sink(common.converter_si
             followcopies=False,
         )
 
-        for file, (action, info, msg) in actions.iteritems():
+        for file, (action, info, msg) in pycompat.iteritems(actions):
             if source.targetfilebelongstosource(file):
                 # If the file belongs to the source repo, ignore the p2
                 # since it will be covered by the existing fileset.
@@ -417,7 +418,7 @@ class mercurial_sink(common.converter_si
         tagparent = tagparent or nodemod.nullid
 
         oldlines = set()
-        for branch, heads in self.repo.branchmap().iteritems():
+        for branch, heads in pycompat.iteritems(self.repo.branchmap()):
             for h in heads:
                 if b'.hgtags' in self.repo[h]:
                     oldlines.update(
@@ -589,7 +590,7 @@ class mercurial_source(common.converter_
         maappend = ma.append
         rappend = r.append
         d = ctx1.manifest().diff(ctx2.manifest())
-        for f, ((node1, flag1), (node2, flag2)) in d.iteritems():
+        for f, ((node1, flag1), (node2, flag2)) in pycompat.iteritems(d):
             if node2 is None:
                 rappend(f)
             else:
@@ -615,7 +616,7 @@ class mercurial_source(common.converter_
         cleanp2 = set()
         if len(parents) == 2:
             d = parents[1].manifest().diff(ctx.manifest(), clean=True)
-            for f, value in d.iteritems():
+            for f, value in pycompat.iteritems(d):
                 if value is None:
                     cleanp2.add(f)
         changes = [(f, rev) for f in files if f not in self.ignored]
diff --git a/hgext/convert/monotone.py b/hgext/convert/monotone.py
--- a/hgext/convert/monotone.py
+++ b/hgext/convert/monotone.py
@@ -103,7 +103,7 @@ class monotone_source(common.converter_s
         # Prepare the command in automate stdio format
         kwargs = pycompat.byteskwargs(kwargs)
         command = []
-        for k, v in kwargs.iteritems():
+        for k, v in pycompat.iteritems(kwargs):
             command.append(b"%d:%s" % (len(k), k))
             if v:
                 command.append(b"%d:%s" % (len(v), v))
diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -151,7 +151,7 @@ def get_log_child(
     def receiver(orig_paths, revnum, author, date, message, pool):
         paths = {}
         if orig_paths is not None:
-            for k, v in orig_paths.iteritems():
+            for k, v in pycompat.iteritems(orig_paths):
                 paths[k] = changedpath(v)
         pickle.dump((paths, revnum, author, date, message), fp, protocol)
 
@@ -245,7 +245,7 @@ class directlogstream(list):
         def receiver(orig_paths, revnum, author, date, message, pool):
             paths = {}
             if orig_paths is not None:
-                for k, v in orig_paths.iteritems():
+                for k, v in pycompat.iteritems(orig_paths):
                     paths[k] = changedpath(v)
             self.append((paths, revnum, author, date, message))
 
@@ -591,7 +591,7 @@ class svn_source(converter_source):
             )
             files = [
                 n
-                for n, e in entries.iteritems()
+                for n, e in pycompat.iteritems(entries)
                 if e.kind == svn.core.svn_node_file
             ]
             self.removed = set()
@@ -681,7 +681,7 @@ class svn_source(converter_source):
                     origpaths = []
                 copies = [
                     (e.copyfrom_path, e.copyfrom_rev, p)
-                    for p, e in origpaths.iteritems()
+                    for p, e in pycompat.iteritems(origpaths)
                     if e.copyfrom_path
                 ]
                 # Apply moves/copies from more specific to general
@@ -712,7 +712,7 @@ class svn_source(converter_source):
                 # be represented in mercurial.
                 addeds = dict(
                     (p, e.copyfrom_path)
-                    for p, e in origpaths.iteritems()
+                    for p, e in pycompat.iteritems(origpaths)
                     if e.action == b'A' and e.copyfrom_path
                 )
                 badroots = set()
@@ -1001,7 +1001,7 @@ class svn_source(converter_source):
             parents = []
             # check whether this revision is the start of a branch or part
             # of a branch renaming
-            orig_paths = sorted(orig_paths.iteritems())
+            orig_paths = sorted(pycompat.iteritems(orig_paths))
             root_paths = [
                 (p, e) for p, e in orig_paths if self.module.startswith(p)
             ]
@@ -1168,7 +1168,7 @@ class svn_source(converter_source):
             path += b'/'
         return (
             (path + p)
-            for p, e in entries.iteritems()
+            for p, e in pycompat.iteritems(entries)
             if e.kind == svn.core.svn_node_file
         )
 
diff --git a/hgext/eol.py b/hgext/eol.py
--- a/hgext/eol.py
+++ b/hgext/eol.py
@@ -367,7 +367,7 @@ def reposetup(ui, repo):
 
     if not repo.local():
         return
-    for name, fn in filters.iteritems():
+    for name, fn in pycompat.iteritems(filters):
         repo.adddatafilter(name, fn)
 
     ui.setconfig(b'patch', b'eol', b'auto', b'eol')
diff --git a/hgext/fastannotate/context.py b/hgext/fastannotate/context.py
--- a/hgext/fastannotate/context.py
+++ b/hgext/fastannotate/context.py
@@ -169,7 +169,7 @@ class annotateopts(object):
 
     def __init__(self, **opts):
         opts = pycompat.byteskwargs(opts)
-        for k, v in self.defaults.iteritems():
+        for k, v in pycompat.iteritems(self.defaults):
             setattr(self, k, opts.get(k, v))
 
     @util.propertycache
@@ -578,7 +578,7 @@ class _annotatecontext(object):
             # find an unresolved line and its linelog rev to annotate
             hsh = None
             try:
-                for (rev, _linenum), idxs in key2idxs.iteritems():
+                for (rev, _linenum), idxs in pycompat.iteritems(key2idxs):
                     if revmap.rev2flag(rev) & revmapmod.sidebranchflag:
                         continue
                     hsh = annotateresult[idxs[0]][0]
@@ -589,7 +589,7 @@ class _annotatecontext(object):
                 # the remaining key2idxs are not in main branch, resolving them
                 # using the hard way...
                 revlines = {}
-                for (rev, linenum), idxs in key2idxs.iteritems():
+                for (rev, linenum), idxs in pycompat.iteritems(key2idxs):
                     if rev not in revlines:
                         hsh = annotateresult[idxs[0]][0]
                         if self.ui.debugflag:
diff --git a/hgext/fastannotate/protocol.py b/hgext/fastannotate/protocol.py
--- a/hgext/fastannotate/protocol.py
+++ b/hgext/fastannotate/protocol.py
@@ -15,6 +15,7 @@ from mercurial import (
     error,
     extensions,
     hg,
+    pycompat,
     util,
     wireprotov1peer,
     wireprotov1server,
@@ -188,7 +189,7 @@ def clientfetch(repo, paths, lastnodemap
         for result in results:
             r = result.result()
             # TODO: pconvert these paths on the server?
-            r = {util.pconvert(p): v for p, v in r.iteritems()}
+            r = {util.pconvert(p): v for p, v in pycompat.iteritems(r)}
             for path in sorted(r):
                 # ignore malicious paths
                 if not path.startswith(b'fastannotate/') or b'/../' in (
diff --git a/hgext/fix.py b/hgext/fix.py
--- a/hgext/fix.py
+++ b/hgext/fix.py
@@ -353,7 +353,9 @@ def cleanup(repo, replacements, wdirwrit
     Useful as a hook point for extending "hg fix" with output summarizing the
     effects of the command, though we choose not to output anything here.
     """
-    replacements = {prec: [succ] for prec, succ in replacements.iteritems()}
+    replacements = {
+        prec: [succ] for prec, succ in pycompat.iteritems(replacements)
+    }
     scmutil.cleanupnodes(repo, replacements, b'fix', fixphase=True)
 
 
@@ -619,7 +621,7 @@ def fixfile(ui, repo, opts, fixers, fixc
     """
     metadata = {}
     newdata = fixctx[path].data()
-    for fixername, fixer in fixers.iteritems():
+    for fixername, fixer in pycompat.iteritems(fixers):
         if fixer.affects(opts, fixctx, path):
             ranges = lineranges(opts, path, basectxs, fixctx, newdata)
             command = fixer.command(ui, path, ranges)
@@ -695,7 +697,7 @@ def writeworkingdir(repo, ctx, filedata,
 
     Directly updates the dirstate for the affected files.
     """
-    for path, data in filedata.iteritems():
+    for path, data in pycompat.iteritems(filedata):
         fctx = ctx[path]
         fctx.write(data, fctx.flags())
         if repo.dirstate[path] == b'n':
diff --git a/hgext/fsmonitor/__init__.py b/hgext/fsmonitor/__init__.py
--- a/hgext/fsmonitor/__init__.py
+++ b/hgext/fsmonitor/__init__.py
@@ -467,12 +467,14 @@ def overridewalk(orig, self, match, subr
             visit.update(f for f in copymap if f not in results and matchfn(f))
     else:
         if matchalways:
-            visit.update(f for f, st in dmap.iteritems() if f not in results)
+            visit.update(
+                f for f, st in pycompat.iteritems(dmap) if f not in results
+            )
             visit.update(f for f in copymap if f not in results)
         else:
             visit.update(
                 f
-                for f, st in dmap.iteritems()
+                for f, st in pycompat.iteritems(dmap)
                 if f not in results and matchfn(f)
             )
             visit.update(f for f in copymap if f not in results and matchfn(f))
diff --git a/hgext/githelp.py b/hgext/githelp.py
--- a/hgext/githelp.py
+++ b/hgext/githelp.py
@@ -116,7 +116,7 @@ def parseoptions(ui, cmdoptions, args):
     opts = dict(
         [
             (k, convert(v)) if isinstance(v, str) else (k, v)
-            for k, v in opts.iteritems()
+            for k, v in pycompat.iteritems(opts)
         ]
     )
 
@@ -132,7 +132,7 @@ class Command(object):
     def __bytes__(self):
         cmd = b"hg " + self.name
         if self.opts:
-            for k, values in sorted(self.opts.iteritems()):
+            for k, values in sorted(pycompat.iteritems(self.opts)):
                 for v in values:
                     if v:
                         if isinstance(v, int):
diff --git a/hgext/hgk.py b/hgext/hgk.py
--- a/hgext/hgk.py
+++ b/hgext/hgk.py
@@ -376,7 +376,9 @@ def view(ui, repo, *etc, **opts):
     b"start interactive history viewer"
     opts = pycompat.byteskwargs(opts)
     os.chdir(repo.root)
-    optstr = b' '.join([b'--%s %s' % (k, v) for k, v in opts.iteritems() if v])
+    optstr = b' '.join(
+        [b'--%s %s' % (k, v) for k, v in pycompat.iteritems(opts) if v]
+    )
     if repo.filtername is None:
         optstr += b'--hidden'
 
diff --git a/hgext/histedit.py b/hgext/histedit.py
--- a/hgext/histedit.py
+++ b/hgext/histedit.py
@@ -2013,7 +2013,7 @@ def _finishhistedit(ui, repo, state, fm)
 
     mapping, tmpnodes, created, ntm = processreplacement(state)
     if mapping:
-        for prec, succs in mapping.iteritems():
+        for prec, succs in pycompat.iteritems(mapping):
             if not succs:
                 ui.debug(b'histedit: %s is dropped\n' % node.short(prec))
             else:
@@ -2051,7 +2051,7 @@ def _finishhistedit(ui, repo, state, fm)
     nodechanges = fd(
         {
             hf(oldn): fl([hf(n) for n in newn], name=b'node')
-            for oldn, newn in mapping.iteritems()
+            for oldn, newn in pycompat.iteritems(mapping)
         },
         key=b"oldnode",
         value=b"newnodes",
@@ -2311,7 +2311,7 @@ def ruleeditor(repo, ui, actions, editco
                     tsum = summary[len(fword) + 1 :].lstrip()
                     # safe but slow: reverse iterate over the actions so we
                     # don't clash on two commits having the same summary
-                    for na, l in reversed(list(newact.iteritems())):
+                    for na, l in reversed(list(pycompat.iteritems(newact))):
                         actx = repo[na.node]
                         asum = _getsummary(actx)
                         if asum == tsum:
@@ -2324,7 +2324,7 @@ def ruleeditor(repo, ui, actions, editco
 
         # copy over and flatten the new list
         actions = []
-        for na, l in newact.iteritems():
+        for na, l in pycompat.iteritems(newact):
             actions.append(na)
             actions += l
 
diff --git a/hgext/infinitepush/__init__.py b/hgext/infinitepush/__init__.py
--- a/hgext/infinitepush/__init__.py
+++ b/hgext/infinitepush/__init__.py
@@ -378,7 +378,7 @@ def _checkheads(orig, pushop):
 
 def wireprotolistkeyspatterns(repo, proto, namespace, patterns):
     patterns = wireprototypes.decodelist(patterns)
-    d = repo.listkeys(encoding.tolocal(namespace), patterns).iteritems()
+    d = pycompat.iteritems(repo.listkeys(encoding.tolocal(namespace), patterns))
     return pushkey.encodekeys(d)
 
 
@@ -392,7 +392,7 @@ def localrepolistkeys(orig, self, namesp
             if pattern.endswith(b'*'):
                 pattern = b're:^' + pattern[:-1] + b'.*'
             kind, pat, matcher = stringutil.stringmatcher(pattern)
-            for bookmark, node in bookmarks.iteritems():
+            for bookmark, node in pycompat.iteritems(bookmarks):
                 if matcher(bookmark):
                     results[bookmark] = node
         return results
@@ -514,7 +514,7 @@ def _generateoutputparts(head, bundlerep
                     if part.type == b'changegroup':
                         haschangegroup = True
                     newpart = bundle2.bundlepart(part.type, data=part.read())
-                    for key, value in part.params.iteritems():
+                    for key, value in pycompat.iteritems(part.params):
                         newpart.addparam(key, value)
                     parts.append(newpart)
 
@@ -757,7 +757,7 @@ def _saveremotebookmarks(repo, newbookma
             # saveremotenames expects 20 byte binary nodes for branches
             branches[rname].append(bin(hexnode))
 
-    for bookmark, hexnode in newbookmarks.iteritems():
+    for bookmark, hexnode in pycompat.iteritems(newbookmarks):
         bookmarks[bookmark] = hexnode
     remotenamesext.saveremotenames(repo, remotepath, branches, bookmarks)
 
@@ -767,7 +767,7 @@ def _savelocalbookmarks(repo, bookmarks)
         return
     with repo.wlock(), repo.lock(), repo.transaction(b'bookmark') as tr:
         changes = []
-        for scratchbook, node in bookmarks.iteritems():
+        for scratchbook, node in pycompat.iteritems(bookmarks):
             changectx = repo[node]
             changes.append((scratchbook, changectx.node()))
         repo._bookmarks.applychanges(repo, tr, changes)
@@ -1005,7 +1005,7 @@ def storetobundlestore(orig, repo, op, u
                 bundle2._processpart(op, part)
             else:
                 bundlepart = bundle2.bundlepart(part.type, data=part.read())
-                for key, value in part.params.iteritems():
+                for key, value in pycompat.iteritems(part.params):
                     bundlepart.addparam(key, value)
 
                 # Certain parts require a response
@@ -1092,7 +1092,7 @@ def processparts(orig, repo, op, unbundl
                     # differs from previous behavior, we need to put it behind a
                     # config flag for incremental rollout.
                     bundlepart = bundle2.bundlepart(part.type, data=part.read())
-                    for key, value in part.params.iteritems():
+                    for key, value in pycompat.iteritems(part.params):
                         bundlepart.addparam(key, value)
 
                     # Certain parts require a response
@@ -1273,7 +1273,9 @@ def _maybeaddpushbackpart(op, bookmark, 
                 b'new': newnode,
                 b'old': oldnode,
             }
-            op.reply.newpart(b'pushkey', mandatoryparams=params.iteritems())
+            op.reply.newpart(
+                b'pushkey', mandatoryparams=pycompat.iteritems(params)
+            )
 
 
 def bundle2pushkey(orig, op, part):
diff --git a/hgext/infinitepush/bundleparts.py b/hgext/infinitepush/bundleparts.py
--- a/hgext/infinitepush/bundleparts.py
+++ b/hgext/infinitepush/bundleparts.py
@@ -13,6 +13,7 @@ from mercurial import (
     error,
     extensions,
     node as nodemod,
+    pycompat,
     revsetlang,
     util,
 )
@@ -67,7 +68,7 @@ def getscratchbranchparts(repo, peer, ou
     parts.append(
         bundle2.bundlepart(
             scratchbranchparttype.upper(),
-            advisoryparams=params.iteritems(),
+            advisoryparams=pycompat.iteritems(params),
             data=cg,
         )
     )
diff --git a/hgext/infinitepush/sqlindexapi.py b/hgext/infinitepush/sqlindexapi.py
--- a/hgext/infinitepush/sqlindexapi.py
+++ b/hgext/infinitepush/sqlindexapi.py
@@ -14,6 +14,8 @@ import time
 import warnings
 import mysql.connector
 
+from mercurial import pycompat
+
 from . import indexapi
 
 
@@ -178,7 +180,7 @@ class sqlindexapi(indexapi.indexapi):
             self.sqlconnect()
         args = []
         values = []
-        for bookmark, node in bookmarks.iteritems():
+        for bookmark, node in pycompat.iteritems(bookmarks):
             args.append(b'(%s, %s, %s)')
             values.extend((bookmark, node, self.reponame))
         args = b','.join(args)
diff --git a/hgext/journal.py b/hgext/journal.py
--- a/hgext/journal.py
+++ b/hgext/journal.py
@@ -126,7 +126,7 @@ def recordbookmarks(orig, store, fp):
     repo = store._repo
     if util.safehasattr(repo, b'journal'):
         oldmarks = bookmarks.bmstore(repo)
-        for mark, value in store.iteritems():
+        for mark, value in pycompat.iteritems(store):
             oldvalue = oldmarks.get(mark, node.nullid)
             if value != oldvalue:
                 repo.journal.record(bookmarktype, mark, oldvalue, value)
diff --git a/hgext/keyword.py b/hgext/keyword.py
--- a/hgext/keyword.py
+++ b/hgext/keyword.py
@@ -507,7 +507,7 @@ def demo(ui, repo, *args, **opts):
         kwmaps = _defaultkwmaps(ui)
         if uikwmaps:
             ui.status(_(b'\tdisabling current template maps\n'))
-            for k, v in kwmaps.iteritems():
+            for k, v in pycompat.iteritems(kwmaps):
                 ui.setconfig(b'keywordmaps', k, v, b'keyword')
     else:
         ui.status(_(b'\n\tconfiguration using current keyword template maps\n'))
@@ -521,7 +521,7 @@ def demo(ui, repo, *args, **opts):
     ui.writenoi18n(b'[extensions]\nkeyword =\n')
     demoitems(b'keyword', ui.configitems(b'keyword'))
     demoitems(b'keywordset', ui.configitems(b'keywordset'))
-    demoitems(b'keywordmaps', kwmaps.iteritems())
+    demoitems(b'keywordmaps', pycompat.iteritems(kwmaps))
     keywords = b'$' + b'$\n$'.join(sorted(kwmaps.keys())) + b'$\n'
     repo.wvfs.write(fn, keywords)
     repo[None].add([fn])
diff --git a/hgext/largefiles/overrides.py b/hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py
+++ b/hgext/largefiles/overrides.py
@@ -688,7 +688,7 @@ def copiespathcopies(orig, ctx1, ctx2, m
     copies = orig(ctx1, ctx2, match=match)
     updated = {}
 
-    for k, v in copies.iteritems():
+    for k, v in pycompat.iteritems(copies):
         updated[lfutil.splitstandin(k) or k] = lfutil.splitstandin(v) or v
 
     return updated
diff --git a/hgext/largefiles/remotestore.py b/hgext/largefiles/remotestore.py
--- a/hgext/largefiles/remotestore.py
+++ b/hgext/largefiles/remotestore.py
@@ -11,6 +11,7 @@ from mercurial.i18n import _
 
 from mercurial import (
     error,
+    pycompat,
     util,
 )
 
@@ -49,7 +50,9 @@ class remotestore(basestore.basestore):
     def exists(self, hashes):
         return dict(
             (h, s == 0)
-            for (h, s) in self._stat(hashes).iteritems()  # dict-from-generator
+            for (h, s) in pycompat.iteritems(
+                self._stat(hashes)
+            )  # dict-from-generator
         )
 
     def sendfile(self, filename, hash):
diff --git a/hgext/lfs/__init__.py b/hgext/lfs/__init__.py
--- a/hgext/lfs/__init__.py
+++ b/hgext/lfs/__init__.py
@@ -381,7 +381,7 @@ def lfsfiles(context, mapping):
     def pointer(v):
         # In the file spec, version is first and the other keys are sorted.
         sortkeyfunc = lambda x: (x[0] != b'version', x)
-        items = sorted(pointers[v].iteritems(), key=sortkeyfunc)
+        items = sorted(pycompat.iteritems(pointers[v]), key=sortkeyfunc)
         return util.sortdict(items)
 
     makemap = lambda v: {
diff --git a/hgext/lfs/pointer.py b/hgext/lfs/pointer.py
--- a/hgext/lfs/pointer.py
+++ b/hgext/lfs/pointer.py
@@ -41,7 +41,7 @@ class gitlfspointer(dict):
 
     def serialize(self):
         sortkeyfunc = lambda x: (x[0] != b'version', x)
-        items = sorted(self.validate().iteritems(), key=sortkeyfunc)
+        items = sorted(pycompat.iteritems(self.validate()), key=sortkeyfunc)
         return b''.join(b'%s %s\n' % (k, v) for k, v in items)
 
     def oid(self):
@@ -63,7 +63,7 @@ class gitlfspointer(dict):
     def validate(self):
         """raise InvalidPointer on error. return self if there is no error"""
         requiredcount = 0
-        for k, v in self.iteritems():
+        for k, v in pycompat.iteritems(self):
             if k in self._requiredre:
                 if not self._requiredre[k].match(v):
                     raise InvalidPointer(
diff --git a/hgext/lfs/wrapper.py b/hgext/lfs/wrapper.py
--- a/hgext/lfs/wrapper.py
+++ b/hgext/lfs/wrapper.py
@@ -25,6 +25,7 @@ from mercurial import (
     exchange,
     exthelper,
     localrepo,
+    pycompat,
     revlog,
     scmutil,
     upgrade,
@@ -138,7 +139,7 @@ def writetostore(self, text, sidedata):
 
     # translate hg filelog metadata to lfs metadata with "x-hg-" prefix
     if hgmeta is not None:
-        for k, v in hgmeta.iteritems():
+        for k, v in pycompat.iteritems(hgmeta):
             metadata[b'x-hg-%s' % k] = v
 
     rawtext = metadata.serialize()
diff --git a/hgext/mq.py b/hgext/mq.py
--- a/hgext/mq.py
+++ b/hgext/mq.py
@@ -2001,7 +2001,7 @@ class queue(object):
                         # we can't copy a file created by the patch itself
                         if dst in copies:
                             del copies[dst]
-                    for src, dsts in copies.iteritems():
+                    for src, dsts in pycompat.iteritems(copies):
                         for dst in dsts:
                             repo.dirstate.copy(src, dst)
                 else:
@@ -4263,7 +4263,7 @@ def extsetup(ui):
     entry[1].extend(mqopt)
 
     def dotable(cmdtable):
-        for cmd, entry in cmdtable.iteritems():
+        for cmd, entry in pycompat.iteritems(cmdtable):
             cmd = cmdutil.parsealiases(cmd)[0]
             func = entry[0]
             if func.norepo:
diff --git a/hgext/rebase.py b/hgext/rebase.py
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -151,7 +151,7 @@ def _ctxdesc(ctx):
     )
     repo = ctx.repo()
     names = []
-    for nsname, ns in repo.names.iteritems():
+    for nsname, ns in pycompat.iteritems(repo.names):
         if nsname == b'branches':
             continue
         names.extend(ns.names(repo, ctx.node()))
@@ -239,7 +239,7 @@ class rebaseruntime(object):
         f.write(b'%d\n' % int(self.keepbranchesf))
         f.write(b'%s\n' % (self.activebookmark or b''))
         destmap = self.destmap
-        for d, v in self.state.iteritems():
+        for d, v in pycompat.iteritems(self.state):
             oldrev = repo[d].hex()
             if v >= 0:
                 newrev = repo[v].hex()
@@ -489,7 +489,7 @@ class rebaseruntime(object):
             # commits.
             self.storestatus(tr)
 
-        cands = [k for k, v in self.state.iteritems() if v == revtodo]
+        cands = [k for k, v in pycompat.iteritems(self.state) if v == revtodo]
         p = repo.ui.makeprogress(
             _(b"rebasing"), unit=_(b'changesets'), total=len(cands)
         )
@@ -1326,7 +1326,7 @@ def _definedestmap(
             # emulate the old behavior, showing "nothing to rebase" (a better
             # behavior may be abort with "cannot find branching point" error)
             bpbase.clear()
-        for bp, bs in bpbase.iteritems():  # calculate roots
+        for bp, bs in pycompat.iteritems(bpbase):  # calculate roots
             roots += list(repo.revs(b'children(%d) & ancestors(%ld)', bp, bs))
 
         rebaseset = repo.revs(b'%ld::', roots)
@@ -1970,7 +1970,7 @@ def needupdate(repo, state):
 
     # We should be standing on the first as-of-yet unrebased commit.
     firstunrebased = min(
-        [old for old, new in state.iteritems() if new == nullrev]
+        [old for old, new in pycompat.iteritems(state) if new == nullrev]
     )
     if firstunrebased in parents:
         return True
@@ -2121,7 +2121,7 @@ def clearrebased(
         fl = fm.formatlist
         fd = fm.formatdict
         changes = {}
-        for oldns, newn in replacements.iteritems():
+        for oldns, newn in pycompat.iteritems(replacements):
             for oldn in oldns:
                 changes[hf(oldn)] = fl([hf(n) for n in newn], name=b'node')
         nodechanges = fd(changes, key=b"oldnode", value=b"newnodes")
diff --git a/hgext/releasenotes.py b/hgext/releasenotes.py
--- a/hgext/releasenotes.py
+++ b/hgext/releasenotes.py
@@ -161,7 +161,7 @@ class releasenotessections(object):
             custom_sections = getcustomadmonitions(repo)
             if custom_sections:
                 sections.update(custom_sections)
-            self._sections = list(sections.iteritems())
+            self._sections = list(pycompat.iteritems(sections))
         else:
             self._sections = list(DEFAULT_SECTIONS)
 
diff --git a/hgext/remotefilelog/__init__.py b/hgext/remotefilelog/__init__.py
--- a/hgext/remotefilelog/__init__.py
+++ b/hgext/remotefilelog/__init__.py
@@ -502,7 +502,7 @@ def checkunknownfiles(orig, repo, wctx, 
     if isenabled(repo):
         files = []
         sparsematch = repo.maybesparsematch(mctx.rev())
-        for f, (m, actionargs, msg) in actions.iteritems():
+        for f, (m, actionargs, msg) in pycompat.iteritems(actions):
             if sparsematch and not sparsematch(f):
                 continue
             if m in (b'c', b'dc', b'cm'):
diff --git a/hgext/remotefilelog/basestore.py b/hgext/remotefilelog/basestore.py
--- a/hgext/remotefilelog/basestore.py
+++ b/hgext/remotefilelog/basestore.py
@@ -148,7 +148,7 @@ class basestore(object):
 
         filenamemap = self._resolvefilenames(existing.keys())
 
-        for filename, sha in filenamemap.iteritems():
+        for filename, sha in pycompat.iteritems(filenamemap):
             yield (filename, existing[sha])
 
     def _resolvefilenames(self, hashes):
diff --git a/hgext/remotefilelog/datapack.py b/hgext/remotefilelog/datapack.py
--- a/hgext/remotefilelog/datapack.py
+++ b/hgext/remotefilelog/datapack.py
@@ -452,7 +452,7 @@ class mutabledatapack(basepack.mutableba
 
     def createindex(self, nodelocations, indexoffset):
         entries = sorted(
-            (n, db, o, s) for n, (db, o, s) in self.entries.iteritems()
+            (n, db, o, s) for n, (db, o, s) in pycompat.iteritems(self.entries)
         )
 
         rawindex = b''
diff --git a/hgext/remotefilelog/historypack.py b/hgext/remotefilelog/historypack.py
--- a/hgext/remotefilelog/historypack.py
+++ b/hgext/remotefilelog/historypack.py
@@ -518,7 +518,7 @@ class mutablehistorypack(basepack.mutabl
 
         files = (
             (hashlib.sha1(filename).digest(), filename, offset, size)
-            for filename, (offset, size) in self.files.iteritems()
+            for filename, (offset, size) in pycompat.iteritems(self.files)
         )
         files = sorted(files)
 
@@ -554,7 +554,7 @@ class mutablehistorypack(basepack.mutabl
             )
             nodeindexoffset += constants.FILENAMESIZE + len(filename)
 
-            for node, location in sorted(nodelocations.iteritems()):
+            for node, location in sorted(pycompat.iteritems(nodelocations)):
                 nodeindexentries.append(
                     struct.pack(nodeindexformat, node, location)
                 )
diff --git a/hgext/remotefilelog/remotefilelog.py b/hgext/remotefilelog/remotefilelog.py
--- a/hgext/remotefilelog/remotefilelog.py
+++ b/hgext/remotefilelog/remotefilelog.py
@@ -21,6 +21,7 @@ from mercurial import (
     ancestor,
     error,
     mdiff,
+    pycompat,
     revlog,
     util,
 )
@@ -428,7 +429,7 @@ class remotefilelog(object):
             return nullid
 
         revmap, parentfunc = self._buildrevgraph(a, b)
-        nodemap = dict(((v, k) for (k, v) in revmap.iteritems()))
+        nodemap = dict(((v, k) for (k, v) in pycompat.iteritems(revmap)))
 
         ancs = ancestor.ancestors(parentfunc, revmap[a], revmap[b])
         if ancs:
@@ -443,7 +444,7 @@ class remotefilelog(object):
             return nullid
 
         revmap, parentfunc = self._buildrevgraph(a, b)
-        nodemap = dict(((v, k) for (k, v) in revmap.iteritems()))
+        nodemap = dict(((v, k) for (k, v) in pycompat.iteritems(revmap)))
 
         ancs = ancestor.commonancestorsheads(parentfunc, revmap[a], revmap[b])
         return map(nodemap.__getitem__, ancs)
@@ -459,7 +460,7 @@ class remotefilelog(object):
         parentsmap = collections.defaultdict(list)
         allparents = set()
         for mapping in (amap, bmap):
-            for node, pdata in mapping.iteritems():
+            for node, pdata in pycompat.iteritems(mapping):
                 parents = parentsmap[node]
                 p1, p2, linknode, copyfrom = pdata
                 # Don't follow renames (copyfrom).
diff --git a/hgext/remotefilelog/remotefilelogserver.py b/hgext/remotefilelog/remotefilelogserver.py
--- a/hgext/remotefilelog/remotefilelogserver.py
+++ b/hgext/remotefilelog/remotefilelogserver.py
@@ -22,6 +22,7 @@ from mercurial import (
     error,
     extensions,
     match,
+    pycompat,
     store,
     streamclone,
     util,
@@ -417,7 +418,7 @@ def gcserver(ui, repo):
     cachepath = repo.vfs.join(b"remotefilelogcache")
     for head in heads:
         mf = repo[head].manifest()
-        for filename, filenode in mf.iteritems():
+        for filename, filenode in pycompat.iteritems(mf):
             filecachepath = os.path.join(cachepath, filename, hex(filenode))
             neededfiles.add(filecachepath)
 
diff --git a/hgext/remotefilelog/repack.py b/hgext/remotefilelog/repack.py
--- a/hgext/remotefilelog/repack.py
+++ b/hgext/remotefilelog/repack.py
@@ -491,12 +491,12 @@ def keepset(repo, keyfn, lastkeepkeys=No
         if type(m) is dict:
             # m is a result of diff of two manifests and is a dictionary that
             # maps filename to ((newnode, newflag), (oldnode, oldflag)) tuple
-            for filename, diff in m.iteritems():
+            for filename, diff in pycompat.iteritems(m):
                 if diff[0][0] is not None:
                     keepkeys.add(keyfn(filename, diff[0][0]))
         else:
             # m is a manifest object
-            for filename, filenode in m.iteritems():
+            for filename, filenode in pycompat.iteritems(m):
                 keepkeys.add(keyfn(filename, filenode))
 
     return keepkeys
@@ -606,7 +606,7 @@ class repacker(object):
         repackprogress = ui.makeprogress(
             _(b"repacking data"), unit=self.unit, total=len(byfile)
         )
-        for filename, entries in sorted(byfile.iteritems()):
+        for filename, entries in sorted(pycompat.iteritems(byfile)):
             repackprogress.update(count)
 
             ancestors = {}
@@ -760,7 +760,7 @@ class repacker(object):
         progress = ui.makeprogress(
             _(b"repacking history"), unit=self.unit, total=len(byfile)
         )
-        for filename, entries in sorted(byfile.iteritems()):
+        for filename, entries in sorted(pycompat.iteritems(byfile)):
             ancestors = {}
             nodes = list(node for node in entries)
 
diff --git a/hgext/remotefilelog/shallowrepo.py b/hgext/remotefilelog/shallowrepo.py
--- a/hgext/remotefilelog/shallowrepo.py
+++ b/hgext/remotefilelog/shallowrepo.py
@@ -15,6 +15,7 @@ from mercurial import (
     error,
     localrepo,
     match,
+    pycompat,
     scmutil,
     sparse,
     util,
@@ -271,7 +272,7 @@ def wraprepo(repo):
             mfrevlog = mfl.getstorage(b'')
             if base is not None:
                 mfdict = mfl[repo[base].manifestnode()].read()
-                skip = set(mfdict.iteritems())
+                skip = set(pycompat.iteritems(mfdict))
             else:
                 skip = set()
 
@@ -301,7 +302,7 @@ def wraprepo(repo):
                 else:
                     mfdict = mfl[mfnode].read()
 
-                diff = mfdict.iteritems()
+                diff = pycompat.iteritems(mfdict)
                 if pats:
                     diff = (pf for pf in diff if m(pf[0]))
                 if sparsematch:
diff --git a/hgext/remotefilelog/shallowutil.py b/hgext/remotefilelog/shallowutil.py
--- a/hgext/remotefilelog/shallowutil.py
+++ b/hgext/remotefilelog/shallowutil.py
@@ -103,7 +103,7 @@ def sumdicts(*dicts):
     """
     result = collections.defaultdict(lambda: 0)
     for dict in dicts:
-        for k, v in dict.iteritems():
+        for k, v in pycompat.iteritems(dict):
             result[k] += v
     return result
 
@@ -111,7 +111,7 @@ def sumdicts(*dicts):
 def prefixkeys(dict, prefix):
     """Returns ``dict`` with ``prefix`` prepended to all its keys."""
     result = {}
-    for k, v in dict.iteritems():
+    for k, v in pycompat.iteritems(dict):
         result[prefix + k] = v
     return result
 
@@ -160,7 +160,7 @@ def _buildpackmeta(metadict):
     length limit is exceeded
     """
     metabuf = b''
-    for k, v in sorted((metadict or {}).iteritems()):
+    for k, v in sorted(pycompat.iteritems((metadict or {}))):
         if len(k) != 1:
             raise error.ProgrammingError(b'packmeta: illegal key: %s' % k)
         if len(v) > 0xFFFE:
@@ -188,7 +188,7 @@ def buildpackmeta(metadict):
     and METAKEYFLAG will be dropped if its value is 0.
     """
     newmeta = {}
-    for k, v in (metadict or {}).iteritems():
+    for k, v in pycompat.iteritems(metadict or {}):
         expectedtype = _metaitemtypes.get(k, (bytes,))
         if not isinstance(v, expectedtype):
             raise error.ProgrammingError(b'packmeta: wrong type of key %s' % k)
@@ -209,7 +209,7 @@ def parsepackmeta(metabuf):
     integers.
     """
     metadict = _parsepackmeta(metabuf)
-    for k, v in metadict.iteritems():
+    for k, v in pycompat.iteritems(metadict):
         if k in _metaitemtypes and int in _metaitemtypes[k]:
             metadict[k] = bin2int(v)
     return metadict
diff --git a/hgext/remotenames.py b/hgext/remotenames.py
--- a/hgext/remotenames.py
+++ b/hgext/remotenames.py
@@ -165,7 +165,7 @@ class lazyremotenamedict(mutablemapping)
         if not self.loaded:
             self._load()
 
-        for k, vtup in self.potentialentries.iteritems():
+        for k, vtup in pycompat.iteritems(self.potentialentries):
             yield (k, [bin(vtup[0])])
 
     items = iteritems
@@ -202,7 +202,7 @@ class remotenames(object):
         if not self._nodetobmarks:
             bmarktonodes = self.bmarktonodes()
             self._nodetobmarks = {}
-            for name, node in bmarktonodes.iteritems():
+            for name, node in pycompat.iteritems(bmarktonodes):
                 self._nodetobmarks.setdefault(node[0], []).append(name)
         return self._nodetobmarks
 
@@ -213,7 +213,7 @@ class remotenames(object):
         if not self._nodetobranch:
             branchtonodes = self.branchtonodes()
             self._nodetobranch = {}
-            for name, nodes in branchtonodes.iteritems():
+            for name, nodes in pycompat.iteritems(branchtonodes):
                 for node in nodes:
                     self._nodetobranch.setdefault(node, []).append(name)
         return self._nodetobranch
@@ -223,7 +223,7 @@ class remotenames(object):
             marktonodes = self.bmarktonodes()
             self._hoisttonodes = {}
             hoist += b'/'
-            for name, node in marktonodes.iteritems():
+            for name, node in pycompat.iteritems(marktonodes):
                 if name.startswith(hoist):
                     name = name[len(hoist) :]
                     self._hoisttonodes[name] = node
@@ -234,7 +234,7 @@ class remotenames(object):
             marktonodes = self.bmarktonodes()
             self._nodetohoists = {}
             hoist += b'/'
-            for name, node in marktonodes.iteritems():
+            for name, node in pycompat.iteritems(marktonodes):
                 if name.startswith(hoist):
                     name = name[len(hoist) :]
                     self._nodetohoists.setdefault(node[0], []).append(name)
diff --git a/hgext/strip.py b/hgext/strip.py
--- a/hgext/strip.py
+++ b/hgext/strip.py
@@ -206,7 +206,7 @@ def stripcmd(ui, repo, *revs, **opts):
             # a revision we have to only delete the bookmark and not strip
             # anything. revsets cannot detect that case.
             nodetobookmarks = {}
-            for mark, node in repomarks.iteritems():
+            for mark, node in pycompat.iteritems(repomarks):
                 nodetobookmarks.setdefault(node, []).append(mark)
             for marks in nodetobookmarks.values():
                 if bookmarks.issuperset(marks):
diff --git a/hgext/uncommit.py b/hgext/uncommit.py
--- a/hgext/uncommit.py
+++ b/hgext/uncommit.py
@@ -78,7 +78,9 @@ def _commitfiltered(
     files = initialfiles - exclude
     # Filter copies
     copied = copiesmod.pathcopies(base, ctx)
-    copied = dict((dst, src) for dst, src in copied.iteritems() if dst in files)
+    copied = dict(
+        (dst, src) for dst, src in pycompat.iteritems(copied) if dst in files
+    )
 
     def filectxfn(repo, memctx, path, contentctx=ctx, redirect=()):
         if path not in contentctx:
diff --git a/hgext/win32text.py b/hgext/win32text.py
--- a/hgext/win32text.py
+++ b/hgext/win32text.py
@@ -209,7 +209,7 @@ def forbidcr(ui, repo, hooktype, node, *
 def reposetup(ui, repo):
     if not repo.local():
         return
-    for name, fn in _filters.iteritems():
+    for name, fn in pycompat.iteritems(_filters):
         repo.adddatafilter(name, fn)
 
 
diff --git a/mercurial/__init__.py b/mercurial/__init__.py
--- a/mercurial/__init__.py
+++ b/mercurial/__init__.py
@@ -31,7 +31,7 @@ if sys.version_info[0] >= 3:
 
         def find_spec(self, fullname, path, target=None):
             # Only handle Mercurial-related modules.
-            if not fullname.startswith(('mercurial.', 'hgext.')):
+            if not fullname.startswith('mercurial.'):
                 return None
             # don't try to parse binary
             if fullname.startswith('mercurial.cext.'):
@@ -46,9 +46,6 @@ if sys.version_info[0] >= 3:
             # don't try and mangle it
             if fullname.startswith('mercurial.rustext'):
                 return None
-            # pywatchman is already dual-version clean, don't try and mangle it
-            if fullname.startswith('hgext.fsmonitor.pywatchman'):
-                return None
 
             # Try to find the module using other registered finders.
             spec = None
@@ -131,7 +128,7 @@ if sys.version_info[0] >= 3:
     # ``replacetoken`` or any mechanism that changes semantics of module
     # loading is changed. Otherwise cached bytecode may get loaded without
     # the new transformation mechanisms applied.
-    BYTECODEHEADER = b'HG\x00\x15'
+    BYTECODEHEADER = b'HG\x00\x16'
 
     class hgloader(importlib.machinery.SourceFileLoader):
         """Custom module loader that transforms source code.
diff --git a/mercurial/pycompat.py b/mercurial/pycompat.py
--- a/mercurial/pycompat.py
+++ b/mercurial/pycompat.py
@@ -337,6 +337,7 @@ if ispy3:
         ret = shlex.split(s.decode('latin-1'), comments, posix)
         return [a.encode('latin-1') for a in ret]
 
+    iteritems = lambda x: x.items()
     itervalues = lambda x: x.values()
 
 else:
@@ -414,6 +415,7 @@ else:
     ziplist = zip
     rawinput = raw_input
     getargspec = inspect.getargspec
+    iteritems = lambda x: x.iteritems()
     itervalues = lambda x: x.itervalues()
 
 isjython = sysplatform.startswith(b'java')