推送到heroku master时被拒绝，安装python依赖时出错

Question

我正在将django-react项目部署到heroku。使用requirements.txt安装python依赖项时，推送被拒绝。有人说这是因为requirements.txt中的一些库被弃用了。但我不确定是哪一个导致了这个问题，以及如何解决它。谢谢。

Heroku错误：

remote: -----> Build succeeded!
remote: -----> Python app detected
remote:  !     Python has released a security update! Please consider upgrading to python-3.7.3
remote:        Learn More: https://devcenter.heroku.com/articles/python-runtimes
remote: -----> Installing python-3.7.4
remote: -----> Installing pip
remote: -----> Installing SQLite3
remote: -----> Installing requirements with pip
remote:  !     Push rejected, failed to compile Python app.
remote:
remote:  !     Push failed

我的requirements.txt：

certifi==2019.6.16
chardet==3.0.4
defusedxml==0.6.0
Django==2.2.4
django-allauth==0.39.1
django-cors-headers==3.1.0
django-countries==5.4
django-rest-auth==0.9.5
djangorestframework==3.10.2
gunicorn==19.9.0
idna==2.8
oauthlib==3.1.0
Pillow==6.1.0
python3-openid==3.1.0
pytz==2019.2
requests==2.22.0
requests-oauthlib==1.2.0
six==1.12.0
sqlparse==0.3.0
urllib3==1.25.3
whitenoise==4.1.3

Answer 1

在requirements.txt中包含setuptools==1.0

Answer 2

使用以下命令清除构建包

$ heroku buildpacks:clear

并再次设置buildpack

$ heroku buildpacks:set heroku/python