### 该问题是怎么引起的？

{'event': '', 'code': -1, 'data': None, 'msg': '数据格式化错误'}

### 重现步骤

发送如下内容示例：

```json

{"event": "SendTextMsg", "robot_wxid": "wxid_07lb7lh9flf055", "to_wxid": "xxxxx", "msg": "Python\u4e2d\u7684\u5b57\u5178\u662f\u4e00\u79cd\u975e\u5e38\u7075\u6d3b\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u5141\u8bb8\u4f60\u5b58\u50a8\u952e\u503c\u5bf9\uff0c\u5e76\u53ef\u4ee5\u901a\u8fc7\u952e\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684\u4f7f\u7528\u65b9\u6cd5\uff1a\n\n1. \u521b\u5efa\u5b57\u5178\uff1a\n\n\n```python\nmy_dict = {'name': 'John', 'age': 30, 'city': 'New York'}\n```\n\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a`my_dict`\u7684\u5b57\u5178\uff0c\u5176\u4e2d\u5305\u542b\u4e09\u4e2a\u952e\u503c\u5bf9\u3002\n\n2. \u6dfb\u52a0\u952e\u503c\u5bf9\uff1a\n\n\n```python\nmy_dict['job'] = 'Engineer'\n```\n\u8fd9\u5c06\u5728\u5b57\u5178\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u952e\u503c\u5bf9\uff0c\u952e\u662f`'job'`\uff0c\u503c\u662f`'Engineer'`\u3002\n\n3. \u8bbf\u95ee\u5b57\u5178\u4e2d\u7684\u503c\uff1a\n\n\n```python\nprint(my_dict['name']) # \u8f93\u51fa: John\n```\n\u4f60\u53ef\u4ee5\u4f7f\u7528\u952e\u6765\u8bbf\u95ee\u5b57\u5178\u4e2d\u7684\u503c\u3002\u5982\u679c\u952e\u4e0d\u5b58\u5728\u4e8e\u5b57\u5178\u4e2d\uff0cPython\u4f1a\u8fd4\u56de\u4e00\u4e2a\u9ed8\u8ba4\u503c\uff08\u901a\u5e38\u662f`None`\u6216\u5f15\u53d1\u4e00\u4e2a`KeyError`\u5f02\u5e38\uff09\u3002\n\n4. \u4fee\u6539\u5b57\u5178\u4e2d\u7684\u503c\uff1a\n\n\n```python\nmy_dict['age'] = 31\n```\n\u8fd9\u4f1a\u4fee\u6539\u5b57\u5178\u4e2d\u952e\u4e3a`'age'`\u7684\u503c\u3002\n\n5. \u5220\u9664\u5b57\u5178\u4e2d\u7684\u952e\u503c\u5bf9\uff1a\n\n\n```python\ndel my_dict['age']\n```\n\u8fd9\u5c06\u5220\u9664\u5b57\u5178\u4e2d\u952e\u4e3a`'age'`\u7684\u952e\u503c\u5bf9\u3002\n\n6. \u68c0\u67e5\u5b57\u5178\u662f\u5426\u5305\u542b\u67d0\u4e2a\u952e\uff1a\n\n\n```python\nif 'job' in my_dict:\n print(\"Job is\", my_dict['job'])\nelse:\n print(\"Job is not in the dictionary\")\n```\n7. \u904d\u5386\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u503c\u5bf9\uff1a\n\n\u53ef\u4ee5\u4f7f\u7528`items()`\u65b9\u6cd5\u6765\u904d\u5386\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u503c\u5bf9\uff0c\u5982\u4e0b\uff1a\n\n\n```python\nfor key, value in my_dict.items():\n print(key, value)\n```\n\u8fd9\u4e9b\u53ea\u662f\u5b57\u5178\u7684\u57fa\u672c\u7528\u6cd5\uff0c\u5b9e\u9645\u4e0a\u8fd8\u6709\u8bb8\u591a\u5176\u4ed6\u7684\u529f\u80fd\u548c\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528`keys()`\u548c`values()`\u65b9\u6cd5\u6765\u5206\u522b\u83b7\u53d6\u5b57\u5178\u7684\u6240\u6709\u952e\u548c\u6240\u6709\u503c\uff0c\u4f7f\u7528`get()`\u65b9\u6cd5\u6765\u83b7\u53d6\u5b57\u5178\u4e2d\u67d0\u4e2a\u952e\u7684\u503c\uff0c\u5373\u4f7f\u8be5\u952e\u4e0d\u5b58\u5728\u4e5f\u4e0d\u4f1a\u5f15\u53d1\u9519\u8bef\u7b49\u3002\u4f60\u53ef\u4ee5\u53c2\u8003Python\u7684\u5b98\u65b9\u6587\u6863\u6765\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u5b57\u5178\u7684\u4fe1\u606f\u3002 \n \n \n"}

```

### 报错信息

{'event': '', 'code': -1, 'data': None, 'msg': '数据格式化错误'}