When I run the last command, I receive
Traceback (most recent call last):
  File "poclbm.py", line 3, in
    import pyopencl as cl
  File "/usr/lib/pymodules/python2.7/pyopencl/__init__.py", line 3, in
    import pyopencl._cl as _cl
ImportError: libboost_python-py27.so.1.42.0: cannot open shared object file: No such file or directory


Libboost_python 1.42 has been installed, so I do not know what the issue is.