Python-生成.txt文件时，它会在每个字符之间创建一个空格

Question

执行下面的代码时，“ BannedList.txt”会生成文件，但是当我检查文件时，每个字符之间都有一个空格：

    if type is "Banned":
        with open('BannedList.csv', 'r') as f:
            # banned_reader = csv.reader(f, delimiter='\t')
            result = {(x[4], x[12]) for x in csv.reader(f)}

        with open('BannedList.csv', 'r') as f:
            banned_reader = csv.reader(f, delimiter=',')
            for row in banned_reader:
                row = ",".join(row)
                self.banned_alt_sku.append(row)

        with open('DailyBannedItems.csv') as f:
            for row in csv.reader(f):
                if(row[0], row[2]) in result:
                    self.new_rows.append(row[4])

        with open('BannedList.txt', 'w', newline='') as output:
            writer = csv.writer(output, skipinitialspace=True, delimiter='\t')
            # writer.writerows(",".join((x, y)) for x, y in zip(self.banned_alt_sku, self.new_rows))
            writer.writerows(",".join((x, y)) for x, y in zip(self.banned_alt_sku, self.new_rows))

我尝试将'r'更改为'rb'，但这给了我以下错误：

'iterator should return strings, not bytes (did you open the file in text mode?)'

我该如何解决这个问题？

谢谢