I made an API for my ML model which is working fine locally. but when I’m deploying it on heroku its showing me ‘Application Error’, though every things seems right to me.
My Python file code:
from flask import Flask, request, jsonify
import pickle
import numpy as np
model = pickle.load(open('pune4.pkl','rb'))
app = Flask(__name__)
@app.route('/')
def home():
return "Pune House Price Prediction App"
@app.route('/predict',methods=['POST'])
#"Viman Nagar","Plot Area",1000,2,3,1,"Ready To Move"
#"Kothrud","Plot Area",1000,2,3,1,"Ready To Move"
def predict():
#location,area,sqft,bath,bhk,balcony,ready
Col_Name = ['bath', 'balcony', 'bhk', 'new_total_sqft', 'Alandi Road', 'Ambegaon Budruk', 'Anandnagar', 'Aundh', 'Aundh Road', 'Balaji Nagar', 'Baner', 'Baner road', 'Bhandarkar Road', 'Bhavani Peth', 'Bibvewadi', 'Bopodi', 'Budhwar Peth', 'Bund Garden Road', 'Camp', 'Chandan Nagar', 'Dapodi', 'Deccan Gymkhana', 'Dehu Road', 'Dhankawadi', 'Dhayari Phata', 'Dhole Patil Road', 'Erandwane', 'Fatima Nagar', 'Fergusson College Road', 'Ganesh Peth', 'Ganeshkhind', 'Ghorpade Peth', 'Ghorpadi', 'Gokhale Nagar', 'Gultekdi', 'Guruwar peth', 'Hadapsar', 'Hadapsar Industrial Estate', 'Hingne Khurd', 'Jangali Maharaj Road', 'Kalyani Nagar', 'Karve Nagar', 'Karve Road', 'Kasba Peth', 'Katraj', 'Khadaki', 'Khadki', 'Kharadi', 'Kondhwa', 'Kondhwa Budruk', 'Kondhwa Khurd', 'Koregaon Park', 'Kothrud', 'Law College Road', 'Laxmi Road', 'Lulla Nagar', 'Mahatma Gandhi Road', 'Mangalwar peth', 'Manik Bagh', 'Market yard', 'Model colony', 'Mukund Nagar', 'Mundhawa', 'Nagar Road', 'Nana Peth', 'Narayan Peth', 'Narayangaon', 'Navi Peth', 'Padmavati', 'Parvati Darshan', 'Pashan', 'Paud Road', 'Pirangut', 'Prabhat Road', 'Pune Railway Station', 'Rasta Peth', 'Raviwar Peth', 'Sadashiv Peth', 'Sahakar Nagar', 'Salunke Vihar', 'Sasson Road', 'Satara Road', 'Senapati Bapat Road', 'Shaniwar Peth', 'Shivaji Nagar', 'Shukrawar Peth', 'Sinhagad Road', 'Somwar Peth', 'Swargate', 'Tilak Road', 'Uruli Devachi', 'Vadgaon Budruk', 'Viman Nagar', 'Vishrant Wadi', 'Wadgaon Sheri', 'Wagholi', 'Wakadewadi', 'Wanowrie', 'Warje', 'Yerawada', 'Ready To Move', 'Built-up Area', 'Carpet Area', 'Plot Area']
Col = np.array(Col_Name)
location = request.form.get('location')
area = request.form.get('area')
sqft = request.form.get('sqft')
bath = request.form.get('bath')
bhk = request.form.get('bhk')
balcony = request.form.get('balcony')
ready = request.form.get('ready')
x=np.zeros(104)
x[0]=bath
x[1]=balcony
x[2]=bhk
x[3]=sqft
if location in Col_Name:
x[Col_Name.index(location)]=1
if area in Col_Name:
x[Col_Name.index(area)]=1
if ready in Col_Name:
x[Col_Name.index(ready)]=1
input_query = np.array([x])
result = model.predict(input_query)[0]
return jsonify({'price': str("{:.2f}".format(float(result))+" Lakhs")})
if __name__=='__main__':
app.run(debug=True)
Procfile
I have tried two ways and from both its not working…First one is
web: gunicorn -b :$PORT app:app
2nd one
web: gunicorn app:app
requirements.txt
flask
numpy
sklearn
gunicorn
This code is working locally but not when I’m deploying it on heroku…I’m sharing with you the build log for the same below..
-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/python
-----> Python app detected
-----> No Python version was specified. Using the same version as the last build: python-3.10.5
To use a different version, see: https://devcenter.heroku.com/articles/python-runtimes
-----> Requirements file has been changed, clearing cached dependencies
-----> Installing python-3.10.5
-----> Installing pip 22.1.2, setuptools 60.10.0 and wheel 0.37.1
-----> Installing SQLite3
-----> Installing requirements with pip
Collecting flask
Downloading Flask-2.1.2-py3-none-any.whl (95 kB)
Collecting numpy
Downloading numpy-1.23.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (17.0 MB)
Collecting sklearn
Downloading sklearn-0.0.tar.gz (1.1 kB)
Preparing metadata (setup.py): started
Preparing metadata (setup.py): finished with status 'done'
Collecting gunicorn==19.9.0
Downloading gunicorn-19.9.0-py2.py3-none-any.whl (112 kB)
Collecting Werkzeug>=2.0
Downloading Werkzeug-2.1.2-py3-none-any.whl (224 kB)
Collecting click>=8.0
Downloading click-8.1.3-py3-none-any.whl (96 kB)
Collecting itsdangerous>=2.0
Downloading itsdangerous-2.1.2-py3-none-any.whl (15 kB)
Collecting Jinja2>=3.0
Downloading Jinja2-3.1.2-py3-none-any.whl (133 kB)
Collecting scikit-learn
Downloading scikit_learn-1.1.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (30.4 MB)
Collecting MarkupSafe>=2.0
Downloading MarkupSafe-2.1.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (25 kB)
Collecting joblib>=1.0.0
Downloading joblib-1.1.0-py2.py3-none-any.whl (306 kB)
Collecting threadpoolctl>=2.0.0
Downloading threadpoolctl-3.1.0-py3-none-any.whl (14 kB)
Collecting scipy>=1.3.2
Downloading scipy-1.8.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (42.2 MB)
Building wheels for collected packages: sklearn
Building wheel for sklearn (setup.py): started
Building wheel for sklearn (setup.py): finished with status 'done'
Created wheel for sklearn: filename=sklearn-0.0-py2.py3-none-any.whl size=1310 sha256=6dfdd78f6b3383217fa591572a1ddd52a2fb27f130bd908add0dadf94d9246b2
Stored in directory: /tmp/pip-ephem-wheel-cache-mswus1_s/wheels/9b/13/01/6f3a7fd641f90e1f6c8c7cded057f3394f451f340371c68f3d
Successfully built sklearn
Installing collected packages: Werkzeug, threadpoolctl, numpy, MarkupSafe, joblib, itsdangerous, gunicorn, click, scipy, Jinja2, scikit-learn, flask, sklearn
Successfully installed Jinja2-3.1.2 MarkupSafe-2.1.1 Werkzeug-2.1.2 click-8.1.3 flask-2.1.2 gunicorn-19.9.0 itsdangerous-2.1.2 joblib-1.1.0 numpy-1.23.0 scikit-learn-1.1.1 scipy-1.8.1 sklearn-0.0 threadpoolctl-3.1.0
-----> Discovering process types
Procfile declares types -> web
-----> Compressing...
Done: 115.9M
-----> Launching...
Released v7
https://house-price-prediction-pun-app.herokuapp.com/ deployed to Heroku
This app is using the Heroku-20 stack, however a newer stack is available.
To upgrade to Heroku-22, see:
https://devcenter.heroku.com/articles/upgrading-to-the-latest-stack
And this is what I’m getting by running ‘heroku log –tail‘ command..
2022-06-30T15:12:54.757974+00:00 heroku[web.1]: State changed from crashed to starting
2022-06-30T15:12:59.995157+00:00 heroku[web.1]: Starting process with command `gunicorn -b :59444 app:app`
2022-06-30T15:13:00.848346+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [4] [INFO] Starting gunicorn 19.9.0
2022-06-30T15:13:00.848665+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [4] [INFO] Listening at: http://0.0.0.0:59444 (4)
2022-06-30T15:13:00.848708+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [4] [INFO] Using worker: sync
2022-06-30T15:13:00.850104+00:00 app[web.1]: /app/.heroku/python/lib/python3.10/os.py:1029: RuntimeWarning: line buffering (buffering=1) isn't supported in binary mode, the default buffer size will be used
2022-06-30T15:13:00.850105+00:00 app[web.1]: return io.open(fd, mode, buffering, encoding, *args, **kwargs)
2022-06-30T15:13:00.852447+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [9] [INFO] Booting worker with pid: 9
2022-06-30T15:13:00.855281+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [9] [ERROR] Exception in worker process
2022-06-30T15:13:00.855281+00:00 app[web.1]: Traceback (most recent call last):
2022-06-30T15:13:00.855283+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
2022-06-30T15:13:00.855283+00:00 app[web.1]: worker.init_process()
2022-06-30T15:13:00.855284+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/gunicorn/workers/base.py", line 129, in init_process
2022-06-30T15:13:00.855284+00:00 app[web.1]: self.load_wsgi()
2022-06-30T15:13:00.855284+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
2022-06-30T15:13:00.855284+00:00 app[web.1]: self.wsgi = self.app.wsgi()
2022-06-30T15:13:00.855285+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/gunicorn/app/base.py", line 67, in wsgi
2022-06-30T15:13:00.855285+00:00 app[web.1]: self.callable = self.load()
2022-06-30T15:13:00.855285+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/gunicorn/app/wsgiapp.py", line 52, in load2022-06-30T15:13:00.855286+00:00 app[web.1]: return self.load_wsgiapp()
2022-06-30T15:13:00.855286+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
2022-06-30T15:13:00.855286+00:00 app[web.1]: return util.import_app(self.app_uri)
2022-06-30T15:13:00.855286+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/gunicorn/util.py", line 350, in import_app2022-06-30T15:13:00.855286+00:00 app[web.1]: __import__(module)
2022-06-30T15:13:00.855287+00:00 app[web.1]: ModuleNotFoundError: No module named 'app'
2022-06-30T15:13:00.855356+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [9] [INFO] Worker exiting (pid: 9)
2022-06-30T15:13:00.885465+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [4] [INFO] Shutting down: Master
2022-06-30T15:13:00.885501+00:00 app[web.1]: [2022-06-30 15:13:00 +0000] [4] [INFO] Reason: Worker failed to boot.
2022-06-30T15:13:01.022806+00:00 heroku[web.1]: Process exited with status 3
2022-06-30T15:13:01.080976+00:00 heroku[web.1]: State changed from starting to crashed
2022-06-30T15:13:11.000000+00:00 app[api]: Build succeeded
2022-06-30T15:14:07.431170+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=house-price-prediction-pun-app.herokuapp.com request_id=9c02f2d9-969f-4118-aa10-12d37a9e9a9b fwd="103.86.183.215" dyno= connect= service= status=503 bytes= protocol=https
2022-06-30T15:14:32.646211+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=house-price-prediction-pun-app.herokuapp.com request_id=d5917fd2-6f3a-4dfd-8238-666f75708dd6 fwd="103.86.183.215" dyno= connect= service= status=503 bytes= protocol=https
2022-06-30T15:14:35.036907+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=house-price-prediction-pun-app.herokuapp.com request_id=2a130348-f99b-4611-b814-6ae82b192cad fwd="103.86.183.215" dyno= connect= service= status=503 bytes= protocol=https
2022-06-30T15:23:09.325242+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=house-price-prediction-pun-app.herokuapp.com request_id=e26dd793-0151-48ca-94b0-9360f3d34986 fwd="103.86.183.215" dyno= connect= service= status=503 bytes= protocol=https
>Solution :
The name of your file should be app.py