ImportError with traceback when unable to load mercurial

[Timmie]

bzr branch https://spyderlib.googlecode.com/hg/ spyderlib
bzr: ERROR: exceptions.ImportError: cannot import name error

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 835, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1030, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 647, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 1195, in run
    from_location)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 952, in open_tree_or_branch
    bzrdir = klass.open(location)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 837, in open
    return BzrDir.open_from_transport(t, _unsupported=_unsupported)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 867, in open_from_transport
    redirected)
  File "/usr/lib/python2.6/dist-packages/bzrlib/lazy_import.py", line 125, in __call__
    return obj(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transport/__init__.py", line 1642, in do_catching_redirections
    return action(transport)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 854, in find_format
    transport, _server_formats=_server_formats)
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 1790, in find_format
    return format.probe_transport(transport)
  File "/home/timmie/.bazaar/plugins/bzr_hg/__init__.py", line 272, in probe_transport
    from mercurial import error as hg_errors
ImportError: cannot import name error

####

 python -c "from mercurial import error as hg_errors"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: cannot import name error

dpkg -l |grep mercurial
ii mercurial 1.1.2-2ubuntu1 scalable distributed version control system
ii mercurial-common 1.1.2-2ubuntu1 scalable distributed versi

[Jelmer Vernooij (jelmer)]

You need at least mercurial 1.3.1.

[Timmie (timmie)]

> You need at least mercurial 1.3.1
Is there a PPA for Ubuntu?
There should be a version that will work at least with the mercurial version in Ubuntu 9.10.

Shall I get mercurial via easy_install for now?

Thanks for your efforts.