sip is needed as a runtime dependency
Traceback (most recent call last):
File "/usr/local/bin/picard", line 2, in <module>
from picard.tagger import main; main('/usr/local/share/locale', True)
File "/usr/local/lib/python2.7/site-packages/picard/tagger.py", line 22, in <module>
import sipImportError: No module named sip