python列表操作方法

標籤：stop   series   filter   ext   rac   top   gpo   sum   style   

系統的列表操作方法不加贅述，這裡增添一些列表操作技巧：

1、利用sum函數把多元列表變成一元：

>>> texts_filtered_stopwords[[‘writing‘, ‘ii‘, ‘rhetorical‘, ‘composing‘, ‘rhetorical‘, ‘composing‘], [‘engages‘, ‘series‘, ‘interactive‘, ‘reading‘], [‘research‘, ‘composing‘, ‘activities‘, ‘along‘, ‘assignments‘, ‘designed‘, ‘help‘]]>>> all_stems = sum(texts_filtered_stopwords,[])>>> all_stems[‘writing‘, ‘ii‘, ‘rhetorical‘, ‘composing‘, ‘rhetorical‘, ‘composing‘, ‘engages‘, ‘series‘, ‘interactive‘, ‘reading‘, ‘research‘, ‘composing‘, ‘activities‘, ‘along‘, ‘assignments‘, ‘designed‘, ‘help‘]

 

python列表操作方法