元組、列表、字典及集合練習

列表練習題： #假定有下面這樣的列表: #names = ['lily', 'denny', 'jenny', 'apple'] #輸出結果爲:'I have lily,denny, jenny and apple.'   names = ['lily', 'denny', 'jenny', 'apple'] print 'I have ' + ','.join(names[:-1]) + ' a

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