这里输入城市名称，获数据时，抛出一个错误，不输入城市名称是正常的。

stapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 101, in jsonable_encoder

    encoded_value = jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 101, in jsonable_encoder

    encoded_value = jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 101, in jsonable_encoder

    encoded_value = jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 101, in jsonable_encoder

    encoded_value = jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 101, in jsonable_encoder

    encoded_value = jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 101, in jsonable_encoder

    encoded_value = jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 145, in jsonable_encoder

    return jsonable_encoder(

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/site-packages/fastapi/encoders.py", line 52, in jsonable_encoder

    if isinstance(obj, BaseModel):

  File "/Users/mecilmeng/miniforge3/envs/fastapi/lib/python3.10/abc.py", line 119, in __instancecheck__

    return _abc_instancecheck(cls, instance)

RecursionError: maximum recursion depth exceeded in comparison