[Python] fastapi.exceptions.FastAPIError: Invalid args for response field! Hint: check that...

getting this error while executing the fast API code fastapi.exceptions.FastAPIError: Invalid args for response field! Hint: check that <class 'main.SoluteSolvent'> is a valid pydantic field type

class SoluteSolvent():
solvent: Text
solute: Text

response = {}
@app.get('/predict')
def predict(sol:SoluteSolvent):
data = sol.dict()
solute = data['solute']
solvent = data['solvent']
results = predictions(solute, solvent)
print(results)
response["predictions"] = results[0].item()
response["interaction_map"] = (results[1].detach().numpy()).tolist()
return {'result':response}


I was actually trying to replicate the code I have written for prediction in flask in fast API.

response = {}
@app.route('/predict', methods=["POST", "GET"])
def predict():
if request.method=='POST':
solute = request.form["solute"]
solvent = request.form["solvent"]

else:
solute = request.args.get("solute")
solvent = request.args.get("solvent")

results = predictions(solute, solvent)

response["predictions"] = results[0].item()
response["interaction_map"] = (results[1].detach().numpy()).tolist()
return flask.jsonify({'result': response})

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