CSV附加换行符

Question

我似乎无法弄清楚如何从csv文件追加字符串。我怎么做得好 添加\ n以便我的输出为：

SNUMBER,FULL_ADDRE
822,822 E ASH AVE


SNUMBER,FULL_ADDRE
822,822 E ASH AVE
1012,1012 BRIAR CREEK RD


SNUMBER,FULL_ADDRE
822,822 E ASH AVE
1012,1012 BRIAR CREEK RD
1026,1026 N MADISON ST

到目前为止我所拥有的是：

    self.u = [] 
    with open(message, 'r') as infile: 
        reader = csv.reader(infile)
        for row in reader:
            self.u.append(','.join(map(str, row)))
            self.f = ','.join(self.u)
            print self.f

SNUMBER,FULL_ADDRE
SNUMBER,FULL_ADDRE,822,822 E ASH AVE
SNUMBER,FULL_ADDRE,822,822 E ASH AVE,1012,1012 BRIAR CREEK RD
SNUMBER,FULL_ADDRE,822,822 E ASH AVE,1012,1012 BRIAR CREEK RD,1026,1026 N MADISON ST