[flex_hackrf (master)]$ python flex.py
Traceback (most recent call last):
File "flex.py", line 24, in <module>
from gnuradio import gr, gru, optfir, eng_notation, blks2, pager
File "/usr/local/lib/python2.7/site-packages/gnuradio/gr/__init__.py", line 27, in <module>
File "/usr/local/lib/python2.7/site-packages/gnuradio/gr/gnuradio_core.py", line 23, in <module>
File "/usr/local/lib/python2.7/site-packages/gnuradio/gr/gnuradio_core_runtime.py", line 28, in <module>
File "/usr/local/lib/python2.7/site-packages/gnuradio/gr/gnuradio_core_runtime.py", line 20, in swig_import_helper
ImportError: No module named _gnuradio_core_runtime