pyparsing import cleaned up
pyparsing import cleaned up

An ImportError was being raised for pyparsing even if it was being
partly successfully imported which may have caused problems in other
places.

committer: Bob Farrell <bob@keys.(none)>

--HG--
extra : convert_revision : b5f24287e4670e4d5358d7eb3a5ff765c8caa89c

hirochachacha/apython,aktorion/bpython,wevial/bpython,aktorion/bpython,thomasballinger/old-bpython-with-hy-support,kdart/bpython,kdart/bpython,myint-archive/bpython,wevial/bpython