Error when deploy Django Project on Heroku

I tried to deploy django app on heroku but got this error.I followed every steps from heroku and this website: https://studygyaan.com/django/django-everywhere-host-your-django-app-for-free-on-heroku.This is my error:

 error: command '/usr/bin/gcc' failed with exit code 1
 ERROR: Command errored out with exit status 1: /app/.heroku/python/bin/python -u -c 'import io, os, sys, setuptools,

tokenize; Please help me with this problems.