heroku：此应用程序未检测到默认语言

Question

第一次使用Heroku。试图推动。我已经运行了命令：

heroku create --buildpack heroku/python

并显示

$ heroku create --buildpack heroku/python
Creating app... done, glacial-reef-7599
Setting buildpack to heroku/python... done
https://glacial-reef-7599.herokuapp.com/ | https://git.heroku.com/glacial-reef-7599.git

堆栈跟踪：

$ git push heroku master
Counting objects: 129, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (124/124), done.
Writing objects: 100% (129/129), 69.06 KiB | 0 bytes/s, done.
Total 129 (delta 22), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote:  !     No default language could be detected for this app.
remote:                         HINT: This occurs when Heroku cannot detect the buildpack to use for this application automatically.
remote:                         See https://devcenter.heroku.com/articles/buildpacks
remote:
remote:  !     Push failed
remote: Verifying deploy...
remote:
remote: !       Push rejected to pure-badlands-9125.
remote:
To https://git.heroku.com/pure-badlands-9125.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/pure-badlands-9125.git'

我一定要错过一些东西。

我已经requirements.txt在我的根目录中添加了一个。看起来像这样：

.git
.idea
projectapp
projectname
rango
db.sqlite3
manage.py
populate_rango.py
requirements.txt

Answer 1

我不记得如何解决此问题，但是在Date Modified发布此问题后查看文件中的创建了两个文件：

runtime.txt（感谢 rurp ），其中包含：

python-3.5.2

Procfile 其中包含：

web: gunicorn projectname.wsgi --log-file -

这是Django专案，并projectname.wsgi导致wsgi.py位于

projectname/wsgi.py

其中包含：

import os
import signal

import sys
import traceback

import time
from django.core.wsgi import get_wsgi_application
from whitenoise.django import DjangoWhiteNoise

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "projectname.settings")

application = get_wsgi_application()
application = DjangoWhiteNoise(application)