Python &引用；导入错误：模块'；xxxxxxxx和x27；没有属性'；主要'&引用；将项目移植到Heroku时

我正在尝试将Python金字塔应用程序移植到Heroku

我必须承认，我不理解Python应用程序的文件结构，即使在阅读了这篇信息丰富的文章之后，它似乎包含了所有的答案：

我已经把一切都准备好了，这样我就可以把源代码更新推送到Heroku，并尝试进行构建。整个过程正在崩溃，因为明显缺少一个“主”属性。我不知道从哪里开始解决这个问题，因为我不知道“main”是什么，它的结构应该是什么，或者它应该驻留在什么文件中

我已经粘贴了我认为相关的内容，但请告诉我是否遗漏了一些有用的内容

我尝试按照这里的说明进行操作：

文件结构：

Procfile
run
runapp.py
wsgi.py
--->/corefinance/
----setup.py
----production.ini
------->/corefinance/
--------__init__.py

Heroku生成错误：

2016-10-10T04:44:45.496214+00:00 app[web.1]: 
2016-10-10T04:44:45.496215+00:00 app[web.1]: Using /app/.heroku/python/lib/python3.5/site-packages
2016-10-10T04:44:45.497067+00:00 app[web.1]: Searching for zope.deprecation==4.1.1
2016-10-10T04:44:45.497245+00:00 app[web.1]: Best match: zope.deprecation 4.1.1
2016-10-10T04:44:45.497356+00:00 app[web.1]: Adding zope.deprecation 4.1.1 to easy-install.pth file
2016-10-10T04:44:45.497742+00:00 app[web.1]: 
2016-10-10T04:44:45.497745+00:00 app[web.1]: Using /app/.heroku/python/lib/python3.5/site-packages
2016-10-10T04:44:45.498530+00:00 app[web.1]: Searching for Mako==1.0.0
2016-10-10T04:44:45.498709+00:00 app[web.1]: Best match: Mako 1.0.0
2016-10-10T04:44:45.498818+00:00 app[web.1]: Adding Mako 1.0.0 to easy-install.pth file
2016-10-10T04:44:45.503267+00:00 app[web.1]: Installing mako-render script to /app/.heroku/python/bin
2016-10-10T04:44:45.503522+00:00 app[web.1]: 
2016-10-10T04:44:45.503524+00:00 app[web.1]: Using /app/.heroku/python/lib/python3.5/site-packages
2016-10-10T04:44:45.503725+00:00 app[web.1]: Finished processing dependencies for corefinance==0.0
2016-10-10T04:44:46.082134+00:00 app[web.1]: Traceback (most recent call last):
2016-10-10T04:44:46.082145+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/setuptools-25.2.0-py3.5.egg/pkg_resources/__init__.py", line 2238, in resolve
2016-10-10T04:44:46.082291+00:00 app[web.1]: AttributeError: module 'corefinance' has no attribute 'main'
2016-10-10T04:44:46.082295+00:00 app[web.1]: 
2016-10-10T04:44:46.082296+00:00 app[web.1]: During handling of the above exception, another exception occurred:
2016-10-10T04:44:46.082297+00:00 app[web.1]: 
2016-10-10T04:44:46.082299+00:00 app[web.1]: Traceback (most recent call last):
2016-10-10T04:44:46.082334+00:00 app[web.1]:   File "runapp.py", line 8, in <module>
2016-10-10T04:44:46.082511+00:00 app[web.1]:     app = loadapp('config:production.ini', relative_to='./corefinance/')
2016-10-10T04:44:46.082519+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 247, in loadapp
2016-10-10T04:44:46.082666+00:00 app[web.1]:     return loadobj(APP, uri, name=name, **kw)
2016-10-10T04:44:46.082668+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 271, in loadobj
2016-10-10T04:44:46.082894+00:00 app[web.1]:     global_conf=global_conf)
2016-10-10T04:44:46.082898+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext
2016-10-10T04:44:46.083142+00:00 app[web.1]:     global_conf=global_conf)
2016-10-10T04:44:46.083165+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 320, in _loadconfig
2016-10-10T04:44:46.083511+00:00 app[web.1]:     return loader.get_context(object_type, name, global_conf)
2016-10-10T04:44:46.083514+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 454, in get_context
2016-10-10T04:44:46.083857+00:00 app[web.1]:     section)
2016-10-10T04:44:46.083862+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 476, in _context_from_use
2016-10-10T04:44:46.084217+00:00 app[web.1]:     object_type, name=use, global_conf=global_conf)
2016-10-10T04:44:46.084221+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 406, in get_context
2016-10-10T04:44:46.084536+00:00 app[web.1]:     global_conf=global_conf)
2016-10-10T04:44:46.084539+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext
2016-10-10T04:44:46.084822+00:00 app[web.1]:     global_conf=global_conf)
2016-10-10T04:44:46.084826+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 328, in _loadegg
2016-10-10T04:44:46.085119+00:00 app[web.1]:     return loader.get_context(object_type, name, global_conf)
2016-10-10T04:44:46.085123+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 620, in get_context
2016-10-10T04:44:46.085560+00:00 app[web.1]:     object_type, name=name)
2016-10-10T04:44:46.085561+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/paste/deploy/loadwsgi.py", line 646, in find_egg_entry_point
2016-10-10T04:44:46.086013+00:00 app[web.1]:     possible.append((entry.load(), protocol, entry.name))
2016-10-10T04:44:46.086015+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/setuptools-25.2.0-py3.5.egg/pkg_resources/__init__.py", line 2230, in load
2016-10-10T04:44:46.086217+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.5/site-packages/setuptools-25.2.0-py3.5.egg/pkg_resources/__init__.py", line 2240, in resolve
2016-10-10T04:44:46.086408+00:00 app[web.1]: ImportError: module 'corefinance' has no attribute 'main'

runapp.py

import os

from paste.deploy import loadapp
from waitress import serve

if __name__ == "__main__":
    port = int(os.environ.get("PORT", 5000))
    app = loadapp('config:production.ini', relative_to='./corefinance/')

    serve(app, host='0.0.0.0', port=port)

./corefinance/setup.py

import os

from setuptools import setup, find_packages

here = os.path.abspath(os.path.dirname(__file__))
with open(os.path.join(here, 'README.txt')) as f:
    README = f.read()
with open(os.path.join(here, 'CHANGES.txt')) as f:
    CHANGES = f.read()

requires = [
    'setuptools',
    'markupsafe',
    'pyramid',
    'pyramid_chameleon',
    'pyramid_debugtoolbar',
    'pyramid_tm',
    'SQLAlchemy',
    'transaction',
    'zope.sqlalchemy',
    'waitress',
    'docutils',
    'pyramid_exclog',
    'cryptacular',
    'pycrypto',
    'webtest',
    ]


setup(name='corefinance',
      version='0.0',
      description='corefinance',
      long_description=README + '\n\n' + CHANGES,
      classifiers=[
        "Programming Language :: Python",
        "Framework :: Pyramid",
        "Topic :: Internet :: WWW/HTTP",
        "Topic :: Internet :: WWW/HTTP :: WSGI :: Application",
        ],
      author='',
      author_email='',
      url='',
      keywords='web wsgi bfg pylons pyramid',
      packages=find_packages(),
      include_package_data=True,
      zip_safe=False,
      test_suite='corefinance',
      install_requires=requires,
      entry_points="""\
      [paste.app_factory]
      main = corefinance:main
      [console_scripts]
      initialize_corefinance_db = corefinance.scripts.initializedb:main
      """,
      )

./corefinance/corefinance/init.py

from pyramid.config import Configurator
from sqlalchemy import engine_from_config
from configparser import SafeConfigParser

import os

from pyramid.authentication import AuthTktAuthenticationPolicy
from pyramid.authorization import ACLAuthorizationPolicy
from pyramid.session import SignedCookieSessionFactory
from .security import groupfinder

from sqlalchemy import engine_from_config

from corefinance.models.meta import DBSession
from corefinance.models.utilities import RootFactory
from corefinance.models.meta import Base


def main(global_config, **settings):
    """ This function returns a Pyramid WSGI application.
    """ 

    parser = SafeConfigParser()
    db_ini_file = settings['db_ini_file']
    iniloc = os.path.abspath(os.path.join(os.path.dirname( __file__ ), '..', db_ini_file))
    read_list = parser.read(iniloc)
    connstring = parser.get('postgres', 'connstring')
    settings['sqlalchemy.url'] = connstring

    engine = engine_from_config(settings, 'sqlalchemy.')
    DBSession.configure(bind=engine)

    session_factory = SignedCookieSessionFactory(
        settings['session.secret']
        )

    authn_policy = AuthTktAuthenticationPolicy(
        settings['session.secret'], callback=groupfinder, hashalg='sha512')
    authz_policy = ACLAuthorizationPolicy()

    config = Configurator(
        settings=settings,
        root_factory=RootFactory,
        authentication_policy=authn_policy,
        authorization_policy=authz_policy,
        session_factory=session_factory
        )    

    Base.metadata.bind = engine
    config.include('pyramid_chameleon')
    config.include(addroutes)
    config.scan()
    return config.make_wsgi_app()

---

我不认为这有什么不起作用的明确原因。不过，有几件事你可以改进

1） 大多数

setup.py

文件都希望从自己的目录中执行。当您运行

python some_folder/setup.py develop

时，您要求的是一段糟糕的时间

pip

为您解决了这个问题，您应该通过执行

pip安装-e一些\u文件夹来切换到它

2） 确保与
setup.py
相同的文件夹中没有
init.py
，因为这可能会混淆依赖
PYTHONPATH
发现代码的
runapp.py
脚本，并且当前文件夹通常位于路径上，这意味着带有
设置的文件夹.py
可以被视为一个包（并且在
\uuuu init\uuuuuuu.py
中找不到
main
）

要想弄明白这一点，最大的考验就是尝试在失败的环境中运行
python
，然后尝试
import corefinance
，看看你得到了什么。这应该会给你一些线索，说明它为什么不起作用。
问题在于我的文件结构有一个额外的层次。正确的文件不在e根，你真的很接近了
from pyramid.config import Configurator
from sqlalchemy import engine_from_config
from configparser import SafeConfigParser

import os

from pyramid.authentication import AuthTktAuthenticationPolicy
from pyramid.authorization import ACLAuthorizationPolicy
from pyramid.session import SignedCookieSessionFactory
from .security import groupfinder

from sqlalchemy import engine_from_config

from corefinance.models.meta import DBSession
from corefinance.models.utilities import RootFactory
from corefinance.models.meta import Base


def main(global_config, **settings):
    """ This function returns a Pyramid WSGI application.
    """ 

    parser = SafeConfigParser()
    db_ini_file = settings['db_ini_file']
    iniloc = os.path.abspath(os.path.join(os.path.dirname( __file__ ), '..', db_ini_file))
    read_list = parser.read(iniloc)
    connstring = parser.get('postgres', 'connstring')
    settings['sqlalchemy.url'] = connstring

    engine = engine_from_config(settings, 'sqlalchemy.')
    DBSession.configure(bind=engine)

    session_factory = SignedCookieSessionFactory(
        settings['session.secret']
        )

    authn_policy = AuthTktAuthenticationPolicy(
        settings['session.secret'], callback=groupfinder, hashalg='sha512')
    authz_policy = ACLAuthorizationPolicy()

    config = Configurator(
        settings=settings,
        root_factory=RootFactory,
        authentication_policy=authn_policy,
        authorization_policy=authz_policy,
        session_factory=session_factory
        )    

    Base.metadata.bind = engine
    config.include('pyramid_chameleon')
    config.include(addroutes)
    config.scan()
    return config.make_wsgi_app()