lightblue on ubuntu breaks down saying LightBluePebble.py cannot import a name pair. #19

Following the instructions for Ubuntu, I got the required packages installed, paired the pebble, and ran the following command:

lamblin@lamblin:~/src/libpebble$ ./p.py --pebble_id 00:18:2F:CC:21:C7 --lightblue get_time
Process Process-2:
Traceback (most recent call last):
  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/google/home/lamblin/src/libpebble/pebble/LightBluePebble.py", line 80, in run
    from lightblue import pair, socket as lb_socket, finddevices, selectdevice
ImportError: cannot import name pair
Process Process-4:
Traceback (most recent call last):
  File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/google/home/lamblin/src/libpebble/pebble/LightBluePebble.py", line 80, in run
    from lightblue import pair, socket as lb_socket, finddevices, selectdevice
ImportError: cannot import name pair

Here's me confirming the packages mentioned:

lamblin@lamblin:~/src/libpebble$ dpkg -s python-dev
Package: python-dev
Status: install ok installed
...
Version: 2.7.3-0ubuntu2
Replaces: python2.7 (<< 2.7.3)
Depends: python (= 2.7.3-0ubuntu2), python2.7-dev (>= 2.7.3)
Description: header files and a static library for Python (default)
 ...
Homepage: http://www.python.org/
Original-Maintainer: Matthias Klose 
lamblin@lamblin:~/src/libpebble$ dpkg -s python-tk
Package: python-tk
Status: install ok installed
...
Version: 2.7.3-1ubuntu1
Replaces: python2.3-tk, python2.4-tk
Provides: python2.7-tk
Depends: python (>= 2.7), python (<< 2.8), blt (>= 2.4z-4.1), libc6 (>= 2.4), tcl8.5 (>= 8.5.0), tk8.5 (>= 8.5.0)
Suggests: tix, python-tk-dbg
Conflicts: python2.3-tk, python2.4-tk
Description: Tkinter - Writing Tk applications with Python
 ...
Original-Maintainer: Matthias Klose 
lamblin@lamblin:~/src/libpebble$ dpkg -s libopenobex1-dev
Package: libopenobex1-dev
Status: install ok installed
...
Version: 1.5-2build1
Provides: libopenobex-dev
Depends: libopenobex1 (= 1.5-2build1), libbluetooth-dev, libusb-dev (>= 2:0.1.11)
Suggests: pkg-config
Conflicts: libopenobex-dev
Description: OBEX protocol library - development files
 ...
Original-Maintainer: martin f. krafft