使用csv模块。写出一行时，用于
row[:-1]截去最后一项：
import csvwith open(filename,"r") as fin: with open(outname,"w") as fout: writer=csv.writer(fout) for row in csv.reader(fin): writer.writerow(row[:-1])
使用csv模块。写出一行时，用于
row[:-1]截去最后一项：
import csvwith open(filename,"r") as fin: with open(outname,"w") as fout: writer=csv.writer(fout) for row in csv.reader(fin): writer.writerow(row[:-1])
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