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grest = [,,,,,,,] mun1 = grest.count() mun2 = grest.index() mun3 = (grest) (mun1,mun2,mun3) char_sorted1 = (grest) char_sorted2 = (grest,= ) (,char_sorted1,, char_sorted2) (,grest) grest1 = grest grest_sort1 = grest1.sort() grest_sort2 = grest1.sort(= ) (,grest_sort1,,grest_sort2) (,grest1)
grest_sort1为什么输出是None grest_sort2为什么输出是None