PEP 8 fixes for pinfer.py
More PEP8 fixes for pinfer.py
Use isinstance() instead of is for type comparison in pinfer.py
PEP 8 fixes for p.py
Style fix for p.py
PEP 8 fixes for test_pinfer.py
PEP 8 fixes for test_pinfer3.py
Revert change to use isinstance
Merge branch 'ivuk-pep8-fixes-5'