'ImportError: No module named '，heroku 上的烧瓶答案

【问题标题】：'ImportError: No module named ' , flask on heroku'ImportError: No module named '，heroku 上的烧瓶
【发布时间】：2016-01-23 17:36:49
【问题描述】：

我正在开发一个烧瓶应用程序，其结构如基于http://code.tutsplus.com/tutorials/an-introduction-to-pythons-flask-framework--net-28822 的屏幕截图所示。为了让它在本地工作，我一直在运行 routes.py 文件。

我现在正在尝试使用 gunicorn 在 heroku 上部署 https://www.udacity.com/wiki/ud330/deploy。按照说明，我的 requirements.txt 包含：

$ pip Freeze
Flask==0.10.1
Flask-Mail==0.9.1
Flask-SQLAlchemy==2.1
Flask-WTF==0.12
Jinja2==2.8
MarkupSafe==0.23
SQLAlchemy==1.0.11
WTForms==2.1
Werkzeug==0.11.3
blinker==1.4
gunicorn==19.4.5
itsdangerous==0.24

我不确定要在我的 Procfile 中添加什么，我尝试了几种变体，包括：

web: gunicorn mini:intro_to_flask

但我在 heroku 日志中得到以下信息：

←[32m2016-01-23T17:15:39.572265+00:00 app[web.1]:←[0m ImportError: No module named mi
ni
←[32m2016-01-23T17:15:39.652562+00:00 app[web.1]:←[0m     super(Application, self).ru
n()
←[32m2016-01-23T17:15:39.652583+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/base.py", line 72, in run
←[32m2016-01-23T17:15:39.652835+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/arbiter.py", line 347, in stop
←[32m2016-01-23T17:15:39.572260+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
←[32m2016-01-23T17:15:39.652807+00:00 app[web.1]:←[0m     self.stop()
←[32m2016-01-23T17:15:39.652914+00:00 app[web.1]:←[0m     time.sleep(0.1)
←[32m2016-01-23T17:15:39.653207+00:00 app[web.1]:←[0m gunicorn.errors.HaltServer: <Ha
ltServer 'Worker failed to boot.' 3>
←[32m2016-01-23T17:15:40.600197+00:00 heroku[web.1]:←[0m State changed from starting
to crashed
←[32m2016-01-23T17:15:40.576720+00:00 heroku[web.1]:←[0m Process exited with status 1

我的 runserver.py 文件还包含：

from intro_to_flask import app

app.run(debug=True)

我该如何解决这个问题？

编辑将 Procfile 更改为：

web: gunicorn runserver:app

现在得到：

←[32m2016-01-23T17:47:43.545434+00:00 app[web.1]:←[0m     from intro_to_flask import
app
←[32m2016-01-23T17:47:43.545435+00:00 app[web.1]:←[0m ImportError: No module named in
tro_to_flask
←[32m2016-01-23T17:47:43.545435+00:00 app[web.1]:←[0m Traceback (most recent call las
t):
←[32m2016-01-23T17:47:43.545436+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/arbiter.py", line 515, in spawn_worker
←[32m2016-01-23T17:47:43.545438+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/workers/base.py", line 122, in init_process
←[32m2016-01-23T17:47:43.545437+00:00 app[web.1]:←[0m     worker.init_process()
←[32m2016-01-23T17:47:43.545438+00:00 app[web.1]:←[0m     self.load_wsgi()
←[32m2016-01-23T17:47:43.545439+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/workers/base.py", line 130, in load_wsgi
←[32m2016-01-23T17:47:43.545440+00:00 app[web.1]:←[0m     self.wsgi = self.app.wsgi()

←[32m2016-01-23T17:47:43.545440+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
←[32m2016-01-23T17:47:43.545441+00:00 app[web.1]:←[0m     self.callable = self.load()

←[32m2016-01-23T17:47:43.545442+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 65, in load
←[32m2016-01-23T17:47:43.545442+00:00 app[web.1]:←[0m     return self.load_wsgiapp()
←[32m2016-01-23T17:47:43.545443+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
←[32m2016-01-23T17:47:43.545444+00:00 app[web.1]:←[0m     return util.import_app(self

编辑2：

对正常的 '__init__.py' 进行了更改。 intro_to_flask 现在注册为一个模块：

←[36m2016-01-23T18:15:18.071418+00:00 app[web.1]:←[0m     from intro_to_flask import
app
←[36m2016-01-23T18:15:18.150803+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 74, in run
←[36m2016-01-23T18:15:18.150846+00:00 app[web.1]:←[0m     WSGIApplication("%(prog)s [
OPTIONS] [APP_MODULE]").run()
←[36m2016-01-23T18:15:18.071419+00:00 app[web.1]:←[0m ImportError: cannot import name
 app
←[36m2016-01-23T18:15:18.071605+00:00 app[web.1]:←[0m [2016-01-23 18:15:18 +0000] [10
] [INFO] Worker exiting (pid: 10)
←[36m2016-01-23T18:15:18.150976+00:00 app[web.1]:←[0m     Arbiter(self).run()
←[36m2016-01-23T18:15:18.150712+00:00 app[web.1]:←[0m Traceback (most recent call las
t):
←[36m2016-01-23T18:15:18.151078+00:00 app[web.1]:←[0m     self.halt(reason=inst.reaso
n, exit_status=inst.exit_status)
←[36m2016-01-23T18:15:18.150718+00:00 app[web.1]:←[0m   File "/app/.heroku/python/bin
/gunicorn", line 11, in <module>
←[36m2016-01-23T18:15:18.151098+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/arbiter.py", line 302, in halt
←[36m2016-01-23T18:15:18.150773+00:00 app[web.1]:←[0m     sys.exit(run())
←[36m2016-01-23T18:15:18.151169+00:00 app[web.1]:←[0m     self.stop()
←[36m2016-01-23T18:15:18.151172+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/arbiter.py", line 347, in stop
←[36m2016-01-23T18:15:18.151267+00:00 app[web.1]:←[0m     time.sleep(0.1)
←[36m2016-01-23T18:15:18.150869+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/base.py", line 192, in run
←[36m2016-01-23T18:15:18.151289+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/arbiter.py", line 219, in handle_chld
←[36m2016-01-23T18:15:18.150923+00:00 app[web.1]:←[0m     super(Application, self).ru
n()
←[36m2016-01-23T18:15:18.151342+00:00 app[web.1]:←[0m     self.reap_workers()
←[36m2016-01-23T18:15:18.150943+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/app/base.py", line 72, in run
←[36m2016-01-23T18:15:18.151362+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/arbiter.py", line 464, in reap_workers
←[36m2016-01-23T18:15:18.150998+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/gunicorn/arbiter.py", line 206, in run
←[36m2016-01-23T18:15:18.151520+00:00 app[web.1]:←[0m gunicorn.errors.HaltServer: <Ha
ltServer 'Worker failed to boot.' 3>
←[36m2016-01-23T18:15:18.151455+00:00 app[web.1]:←[0m     raise HaltServer(reason, se
lf.WORKER_BOOT_ERROR)
←[36m2016-01-23T18:15:19.049307+00:00 heroku[web.1]:←[0m Process exited with status 1

←[36m2016-01-23T18:15:19.061843+00:00 heroku[web.1]:←[0m State changed from starting
to crashed

编辑 3：

←[36m2016-01-23T19:14:56.910512+00:00 app[web.1]:←[0m     from intro_to_flask import
routes
←[36m2016-01-23T19:14:56.910513+00:00 app[web.1]:←[0m   File "/app/intro_to_flask/rou
tes.py", line 123, in <module>
←[36m2016-01-23T19:14:56.910513+00:00 app[web.1]:←[0m     app.run()
←[36m2016-01-23T19:14:56.910514+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/flask/app.py", line 772, in run
←[36m2016-01-23T19:14:56.910515+00:00 app[web.1]:←[0m     run_simple(host, port, self
, **options)
←[36m2016-01-23T19:14:56.910515+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/werkzeug/serving.py", line 692, in run_simple
←[36m2016-01-23T19:14:56.910516+00:00 app[web.1]:←[0m     inner()
←[36m2016-01-23T19:14:56.910516+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/werkzeug/serving.py", line 654, in inner
←[36m2016-01-23T19:14:56.910517+00:00 app[web.1]:←[0m     fd=fd)
←[36m2016-01-23T19:14:56.910518+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/werkzeug/serving.py", line 548, in make_server
←[36m2016-01-23T19:14:56.910518+00:00 app[web.1]:←[0m     passthrough_errors, ssl_con
text, fd=fd)
←[36m2016-01-23T19:14:56.910519+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/site-packages/werkzeug/serving.py", line 462, in __init__
←[36m2016-01-23T19:14:56.910523+00:00 app[web.1]:←[0m     HTTPServer.__init__(self, (
host, int(port)), handler)
←[36m2016-01-23T19:14:56.910524+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/SocketServer.py", line 420, in __init__
←[36m2016-01-23T19:14:56.910525+00:00 app[web.1]:←[0m     self.server_bind()
←[36m2016-01-23T19:14:56.910526+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/BaseHTTPServer.py", line 108, in server_bind
←[36m2016-01-23T19:14:56.910526+00:00 app[web.1]:←[0m     SocketServer.TCPServer.serv
er_bind(self)
←[36m2016-01-23T19:14:56.910527+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/SocketServer.py", line 434, in server_bind
←[36m2016-01-23T19:14:56.910528+00:00 app[web.1]:←[0m     self.socket.bind(self.serve
r_address)
←[36m2016-01-23T19:14:56.910529+00:00 app[web.1]:←[0m   File "/app/.heroku/python/lib
/python2.7/socket.py", line 228, in meth
←[36m2016-01-23T19:14:56.910529+00:00 app[web.1]:←[0m     return getattr(self._sock,n
ame)(*args)
←[36m2016-01-23T19:14:56.910548+00:00 app[web.1]:←[0m error: [Errno 98] Address alrea
dy in use
←[36m2016-01-23T19:14:56.910686+00:00 app[web.1]:←[0m [2016-01-23 19:14:56 +0000] [10
] [INFO] Worker exiting (pid: 10)
←[36m2016-01-23T19:14:57.199826+00:00 heroku[web.1]:←[0m State changed from starting
to up

【问题讨论】：

标签： python heroku flask

【解决方案1】：

如果您从文件 intro_to_flask 中的烧瓶创建应用程序实例，并且您的实例变量的名称是 app:

intro_to_flask.py

...
app = Flask()
...

把Procfile改成这个

web: gunicorn intro_to_flask:app

【讨论】：

【解决方案2】：

您需要指出的是app 对象，正如您所展示的，它位于runserver 文件中。所以：

gunicorn runserver:app

【讨论】：

你在那个模块中有一个奇怪的文件名：它应该只是__init__.py，没有a。
嗨丹尼尔，我修复了这个问题，但它仍然无法正常工作。请参阅编辑 2。
我将 runserver 文件更改为 from intro_to_flask import routes routes.run(debug=True)。现在得到 [0m 错误：[Errno 98] 地址已在使用中。请参阅编辑 3。
请向我们提供有关代码的更多详细信息，特别是您定义应用程序实例的位置。