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lst = ['bb', 'zz', 'ff', 'aa', 'kk', 'pp', 'oo', 'ww', 'rr'] N = 4 lst = lst[: -N or None] print(lst) ''' run: ['bb', 'zz', 'ff', 'aa', 'kk'] '''
lst = ['bb', 'zz', 'ff', 'aa', 'kk', 'pp', 'oo', 'ww', 'rr'] N = 4 lst = lst[: len(lst) - N] print(lst) ''' run: ['bb', 'zz', 'ff', 'aa', 'kk'] '''