REF: Do not show plots. Get rid of plain assert
REF: pyplot -> np.random
BUG: Do not duplicate notch keyword
REF: plt -> np
BUG: Pass arrays to histogram2d
TST: Remove nottest. Fix unicode tests
ENH: Fix unicode handling. encode in/decode out for mpl
ENH: Use pandas idiom. Avoid bug in Series.get
TST: Remove more nottests
STY: Refactor tests for pep-8 and nose
STY/ENH: Reword failures. Fix missing decode.