[FIXED] KeyError: 'value' for sepal_length

Issue

I'm facing KeyError error here
File "C:\Users\ayush\Python\iris_server.py", line 11, in predict predict_request=[[data["sepal_length"],data["sepal_width"],data["petal_length"],data["petal_width"]]]
KeyError: 'sepal_length'
when I run my client side code which has hardcoded values of the data fields

Flask Server side:

from flask import Flask, request, jsonify
import numpy as np
import pickle
import os
os.chdir('C:/Users/bhosl/Python')
model = pickle.load(open('iris_model','rb')) 
app = Flask(__name__)
@app.route('/api',methods=['POST'])  
def predict():     
    data = request.get_json(force=True)     
    predict_request=[[data["sepal_length"],data["sepal_width"],data["petal_length"],data["petal_width"]]]     
    req=np.array(predict_request)    
    print(req)     
    prediction = model.predict(predict_request)     
    pred = prediction[0]     
    print(pred)     
    return jsonify(int(pred))
    
if __name__ == '__main__':          
    app.run(port=5000, debug=True)

Client side

import requests
import json
r = requests.post('http://localhost:5000/api', json={
    "sepal_lenth":3.2,
    "sepal_width":7.3,
    "petal_length":4.5,
    "petal_width":2.1
})
print(r.json)
print(r.status_code)

while the client side gives
<bound method Response.json of <Response [500]>>
500 as the output so assuming the code isn't the problem here, How can I fix this
Thanks in Advance

Solution

You misspelled sepal_length as sepal_lenth on the client side.

KeyError is caused by python not being able to find a key in the dictionary. In your case, it cannot find the key sepal_length. The <Response [500]> because your sever encountered an Internal Server Error(KeyError), returning the status code of 500.

This should work:

import requests
import json
r = requests.post('http://localhost:5000/api', json={
    "sepal_length":3.2,
    "sepal_width":7.3,
    "petal_length":4.5,
    "petal_width":2.1
})
print(r.json)
print(r.status_code)

Answered By - Parzival