部署到heroku要求时出现Django错误

Question

我正在尝试将我的django应用程序部署到heroku。我有一个虚拟环境(当然)。我已经正确地设置了procfile、setup.py和runtime.txt。它在本地开发服务器上运行得很好，但是当我推送到heroku时，它给出了一些关于需求文件的错误。

这是继推送到heroku之后的第三次回溯。我更改了procfile的前两次，然后它只给出了procfile的错误。现在，procfile错误消失了，我对此有了一些错误。

回溯：

    Counting objects: 3, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 309 bytes | 0 bytes/s, done.
Total 3 (delta 1), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Using set buildpack heroku/python
remote: -----> Python app detected
remote: -----> Uninstalling stale dependencies
remote: Invalid requirement: 'There was a problem loading the given requirements files.'
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python3.5/site-packages/pip-8.1.1-py3.5.egg/pip/req/req_install.py", line 77, in
 __init__
remote:     req = pkg_resources.Requirement.parse(req)
remote:   File "/app/.heroku/python/lib/python3.5/site-packages/pip-8.1.1-py3.5.egg/pip/_vendor/pkg_resources/__init__.p
y", line 3036, in parse
remote:     req, = parse_requirements(s)
remote:   File "/app/.heroku/python/lib/python3.5/site-packages/pip-8.1.1-py3.5.egg/pip/_vendor/pkg_resources/__init__.p
y", line 2980, in parse_requirements
remote:     "version spec")
remote:   File "/app/.heroku/python/lib/python3.5/site-packages/pip-8.1.1-py3.5.egg/pip/_vendor/pkg_resources/__init__.p
y", line 2945, in scan_list
remote:     raise RequirementParseError(msg, line, "at", line[p:])
remote: pip._vendor.pkg_resources.RequirementParseError: Expected version spec in There was a problem loading the given
requirements files. at  was a problem loading the given requirements files.
remote:
remote: You are using pip version 8.1.1, however version 8.1.2 is available.
remote: You should consider upgrading via the 'pip install --upgrade pip' command.
remote:      $ pip install -r requirements.txt
remote:
remote:
remote: -----> Discovering process types
remote:        Procfile declares types -> web, worker
remote:
remote: -----> Compressing...
remote:        Done: 60.3M
remote: -----> Launching...
remote:        Released v6
remote:        https://calm-caverns-85777.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
To https://git.heroku.com/calm-caverns-85777.git
   b1b06b0..d6b1a95  master -> master

Procfile：

web: gunicorn blog.wsgi
worker: python worker.py

requirements.txt：

dj-database-url==0.4.1
Django==1.9.7
django-crispy-forms==1.6.0
django-markdown-deux==1.0.5
django-pagedown==0.1.1
gunicorn==19.6.0
markdown2==2.3.1
Pillow==3.2.0
whitenoise==3.2

runtime.txt：

python-3.5.1

我可以从requirements.txt文件本地安装依赖项，另一件事是当我尝试更新pip时，它显示它已经是最新的。我的运行时环境设置为python 3.5.1。应用程序在部署时崩溃，我假设是因为回溯错误。我能做些什么来解决这个问题呢？

Answer 1

requirements.txt文件是如何创建的？有没有可能它是损坏的，或者不是纯文本，或者里面有不可打印的字符？

我建议删除requirements.txt并基于pip freeze干净地生成它。

如果你使用的是Windows Powershell，encoding issue可能会影响你。建议的解决方案是：

pip freeze | Out-File -Encoding ASCII requirements.txt