只留一组数据

存储.ipynb

@@ -9,7 +9,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 15,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -46,7 +46,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -62,6 +62,10 @@
     "        return info_tuple\n",
     "    # 保存数据\n",
     "    def save_outsideSummary_datas(self, outsideSummary):\n",
+    "        print('+++ [MyDB] delete from outsideSummary_realtime_datas') \n",
+    "        self.cursor.execute('delete from outsideSummary_realtime_datas') \n",
+    "        self.conn.commit()\n",
+    "        \n",
     "        sql = 'insert into outsideSummary_realtime_datas(currentConfirmedCount,confirmedCount,suspectedCount,curedCount,deadCount,suspectedIncr,currentConfirmedIncr,confirmedIncr,curedIncr,deadIncr) values(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)'\n",
     "        res = self.get_outsideSummary_list_tuple(outsideSummary)\n",
     "        print('+++ save_outsideSummary_datas, data len: %d' % len(res))\n",
@@ -85,13 +89,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
+      "+++ [MyDB] delete from outsideSummary_realtime_datas\n",
       "+++ save_outsideSummary_datas, data len: 1\n",
       "+++ save_outsideSummary_datas is over.\n"
      ]