Convert request.json to DataFrame - json

Question

Hi I'm trying to convert the string received from a POST method that results in a json string to my Flask API. I receive the Error: Expected object or value.
How can I convert the malformed json to correct form to fix this? Here is the code in my backend and I'm using jupyter to test
#app.expect(model)
def post(self):
try:
formData = request.json
formData = {"0": formData}
print(formData)
df_json = pipelineTransform(formData, headers_df)
df_predict = reorder(df_json, headers_df)
#data = [val for val in formData.values()]
predictVal = classifier.predict_proba(df_predict)
print(predictVal)
#types = { 0: "Iris Setosa", 1: "Iris Versicolour ", 2: "Iris Virginica"}
response = jsonify({
"statusCode": 200,
"status": "Prediction made",
"result": "Probability of Heart Disease: " + predictVal + "%"
})
response.headers.add('Access-Control-Allow-Origin', '*')
print(response)
return response
In jupyter:
json_str2 = '''{'Age': '62', 'Sex': 'M', 'Chestpain': 'ASY', 'RestingBP': '140', 'Cholesterol': '175', 'FastingBS': '0',
'RestingECG': 'Normal', 'MaxHR': '205', 'ExerciseAngina': 'N', 'Oldpeak': '0', 'ST_slope': 'Up'}'''
df = pd.read_json(json_str2, orient='columns')
the above string is what is printed from the print statement for formData

Answer 1

Convert to valid JSON string by replacing single quotes with double quotes:
json_str2 = json_str2.replace("'", "\"")
You don't have an index column in the data. So, you can use orient="index" and transpose it:
df = pd.read_json(json_str2, orient="index").transpose()
[Out]:
Age Sex Chestpain RestingBP Cholesterol FastingBS RestingECG MaxHR ExerciseAngina Oldpeak ST_slope
0 62 M ASY 140 175 0 Normal 205 N 0 Up