Conform to PEP 8

sartoris/sartoris$ pep8 sartoris.py
sartoris.py:52:1: E302 expected 2 blank lines, found 1
sartoris.py:54:51: E231 missing whitespace after ','
sartoris.py:59:24: E701 multiple statements on one line (colon)
sartoris.py:171:64: E701 multiple statements on one line (colon)
sartoris.py:171:58: E231 missing whitespace after ','
sartoris.py:180:13: E128 continuation line under-indented for visual indent
sartoris.py:181:13: E128 continuation line under-indented for visual indent
sartoris.py:231:13: E128 continuation line under-indented for visual indent
sartoris.py:231:13: E125 continuation line does not distinguish itself from next logical line
sartoris.py:354:13: E128 continuation line under-indented for visual indent

Change-Id: Ibea81aef5b7decba2bf44e591ffd7e00df35b9c2