subtle bugs everywhere generating documentation for data wrangling code chenyang yang shurui zhou jin l c guo christian kastner peking university university of toronto mcgill university carnegie mellon university abstract ...
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...Subtle bugs everywhere generating documentation for data wrangling code chenyang yang shurui zhou jin l c guo christian kastner peking university of toronto mcgill carnegie mellon abstract datascientists reportedly spend a signicant amount debugging is often concise se their time in daily routines on i e quencing multiple nontrivial transformations as cleaning and extracting features however our example fig but also usually not well repetitive error prone to write moreover it tested scientists currently mostly rely easy introduce when reusing adopting existing reading inserting print statements look potential which results reduced model quality support with we present technique generate problems use program reuse heavily through copy synthesis techniques automatically summarize transfor ing editing snippets within notebook mations test case selection purposefully from other notebooks tutorials or stackover select representative examples the based execution ow at same information collec...