Push rejected failed to compile python app-CodePudding

so i get this error when i try to deploy my master branch, i have set my requirements.txt, runtime.txt and Procfile but i still get this error

-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/python
-----> Python app detected
-----> Using Python version specified in runtime.txt
 !     Requested runtime (python - 3.9.7) is not available for this stack (heroku-20).
 !     Aborting.  More info: https://devcenter.heroku.com/articles/python-support
 !     Push rejected, failed to compile Python app.
 !     Push failed

my requirements.txt file

asgiref==3.4.1
dj-database-url==0.5.0
Django==3.2.7
django-heroku==0.3.1
gunicorn==20.1.0
Pillow==8.4.0
psycopg2==2.9.2
python-decouple==3.5
pytz==2021.3
sqlparse==0.4.2
whitenoise==5.3.0

please help

CodePudding user response：

Your python version is not supported on heroku stack 20 as stated in the fifth line to check supported runtime see Heroku documentation

CodePudding user response：

Heroku stack supports python-3.9.9 so specify that in your runtime.txt:

python-3.9.9

Have a look at the stack at https://devcenter.heroku.com/articles/heroku-20-stack