TemplateSyntaxError：在呈現時捕獲ImportError：無法導入名稱utils

Question

我無法讓我的CentOS 6/Apache/2.2.15上運行這個django應用程序。當我運行應用程序，我得到這個錯誤：

Traceback (most recent call last): 
    File "/usr/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 272, in __call__ 
    response = self.get_response(request) 
    File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 169, in get_response 
    response = self.handle_uncaught_exception(request, resolver, sys.exc_info()) 
    File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 203, in handle_uncaught_exception 
    return debug.technical_500_response(request, *exc_info) 
    File "/usr/local/lib/python2.7/site-packages/django/views/debug.py", line 59, in technical_500_response 
    html = reporter.get_traceback_html() 
    File "/usr/local/lib/python2.7/site-packages/django/views/debug.py", line 151, in get_traceback_html 
    return t.render(c) 
    File "/usr/local/lib/python2.7/site-packages/django/template/base.py", line 123, in render 
    return self._render(context) 
    File "/usr/local/lib/python2.7/site-packages/django/template/base.py", line 117, in _render 
    return self.nodelist.render(context) 
    File "/usr/local/lib/python2.7/site-packages/django/template/base.py", line 744, in render 
    bits.append(self.render_node(node, context)) 
    File "/usr/local/lib/python2.7/site-packages/django/template/debug.py", line 73, in render_node 
    result = node.render(context) 
    File "/usr/local/lib/python2.7/site-packages/django/template/debug.py", line 90, in render 
    output = self.filter_expression.resolve(context) 
    File "/usr/local/lib/python2.7/site-packages/django/template/base.py", line 536, in resolve 
    new_obj = func(obj, *arg_vals) 
    File "/usr/local/lib/python2.7/site-packages/django/template/defaultfilters.py", line 695, in date 
    return format(value, arg) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/dateformat.py", line 285, in format 
    return df.format(format_string) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/dateformat.py", line 30, in format 
    pieces.append(force_unicode(getattr(self, piece)())) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/dateformat.py", line 191, in r 
    return self.format('D, j M Y H:i:s O') 
    File "/usr/local/lib/python2.7/site-packages/django/utils/dateformat.py", line 30, in format 
    pieces.append(force_unicode(getattr(self, piece)())) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/encoding.py", line 71, in force_unicode 
    s = unicode(s) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/functional.py", line 206, in __unicode_cast 
    return self.__func(*self.__args, **self.__kw) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/translation/__init__.py", line 81, in ugettext 
    return _trans.ugettext(message) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 286, in ugettext 
    return do_translate(message, 'ugettext') 
    File "/usr/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 276, in do_translate 
    _default = translation(settings.LANGUAGE_CODE) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 185, in translation 
    default_translation = _fetch(settings.LANGUAGE_CODE) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 162, in _fetch 
    app = import_module(appname) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module 
    __import__(name) 
    File "/usr/local/lib/python2.7/site-packages/django/contrib/admin/__init__.py", line 3, in <module> 
    from django.contrib.admin.helpers import ACTION_CHECKBOX_NAME 
    File "/usr/local/lib/python2.7/site-packages/django/contrib/admin/helpers.py", line 3, in <module> 
    from django.contrib.admin.util import (flatten_fieldsets, lookup_field, 
    File "/usr/local/lib/python2.7/site-packages/django/contrib/admin/util.py", line 1, in <module> 
    from django.db import models 
    File "/usr/local/lib/python2.7/site-packages/django/db/__init__.py", line 78, in <module> 
    connection = connections[DEFAULT_DB_ALIAS] 
    File "/usr/local/lib/python2.7/site-packages/django/db/utils.py", line 93, in __getitem__ 
    backend = load_backend(db['ENGINE']) 
    File "/usr/local/lib/python2.7/site-packages/django/db/utils.py", line 33, in load_backend 
    return import_module('.base', backend_name) 
    File "/usr/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module 
    __import__(name) 
    File "/usr/local/lib/python2.7/site-packages/django/db/backends/postgresql_psycopg2/base.py", line 9, in <module> 
    from django.db import utils 
TemplateSyntaxError: Caught ImportError while rendering: cannot import name utils 

搜索這個錯誤我已經找到了幾個解決方案，嘗試了所有，但沒有工作：

1. 製作WSGI運行在守護進程模式。
2. 檢查Django安裝路徑是否在Python PAth中。
3. 我認爲它可能是運行在同一個Apache VirtualHost上的另一個應用程序，所以我把另一個VH（另一個端口），但沒有工作。
4. 我有2分貝連接：Oracle和PostgreSQL在這個應用程序，甲骨文是好的，也許問題是postgresql_psycopg2。我已經安裝好了。

這裏是我的文件：

vhost.conf：

NameVirtualHost 10.7.0.17:80 
    NameVirtualHost 10.7.0.17:8080 

    <VirtualHost 10.7.0.17:80> 
     ServerAdmin webmaster@www.domain.com 
     ServerName www.domain.com 
     ServerAlias www.domain.com 
     DocumentRoot /var/www/www.domain.com/html/ 
     ErrorLog /var/www/www.domain.com/logs/error.log 
     CustomLog /var/www/www.domain.com/logs/access.log combined 

     WSGIDaemonProcess www.domain.com processes=2 threads=15 display-name=%{GROUP} 
     WSGIProcessGroup www.domain.com 


     Alias /vlv/media/ /var/www/www.domain.com/django/vlv_vistoria/media/ 

     WSGIScriptAlias /vlv /var/www/www.domain.com/django/vlv_vistoria/django.wsgi 

     <Directory /var/www/www.domain.com/django/vlv_vistoria> 
      Order allow,deny 
      Allow from all 
      Options Indexes FollowSymLinks 
     </Directory> 


     <Directory /var/www/www.domain.com/django/vlv_vistoria/media> 
      Order allow,deny 
      Allow from all 
      Options Indexes FollowSymLinks 
     </Directory> 

    </VirtualHost> 



    <VirtualHost 10.7.0.17:8080> 
     ServerAdmin webmaster@www.domain.com 
     ServerName www.domain.com 
     ServerAlias www.domain.com 
     DocumentRoot /var/www/www.domain.com/html/ 
     ErrorLog /var/www/www.domain.com/logs/sistema_error.log 
     CustomLog /var/www/www.domain.com/logs/sistema_access.log combined 

     WSGIDaemonProcess sistema.www.domain.com processes=2 threads=15 display-name=%{GROUP} 
     WSGIProcessGroup sistema.www.domain.com 

     Alias /sistema/media/ /var/www/www.domain.com/django/sistema/media/ 

     WSGIScriptAlias /sistema /var/www/www.domain.com/django/sistema/django.wsgi 

     <Directory /var/www/www.domain.com/django/sistema> 
      Order allow,deny 
      Allow from all 
      Options Indexes FollowSymLinks 
     </Directory> 


     <Directory /var/www/www.domain.com/django/sistema/media> 
      Order allow,deny 
      Allow from all 
      Options Indexes FollowSymLinks 
     </Directory> 

    </VirtualHost> 

django.wsgi

import os, sys 

    sys.path.append('/var/www/www.domain.com/django') 
    sys.path.append('/var/www/www.domain.com/django/sistema') 

    sys.path.append('/usr/local/lib/python2.7/site-packages/django') 


    root = os.path.join(os.path.dirname(__file__), '..') 
    sys.path.insert(0, root) 

    os.path.dirname(__file__) 
    sys.path.insert(0, root) 

    os.environ['DJANGO_SETTINGS_MODULE'] = 'settings' 

    os.environ["ORACLE_HOME"] = "/ora00/app/oracle/product/client" 

    import django.core.handlers.wsgi 
    application = django.core.handlers.wsgi.WSGIHandler() 

提前任何幫助感謝。

Answer 1

過去的原因之一是模塊導入路徑問題。

具體而言，使用針對一個版本的Python編譯的mod_wsgi安裝，然後使用WSGIPythonPath或其他方式設置Python路徑來引用使用不同Python版本構建的Python虛擬環境。

因此，驗證編譯和安裝的Python mod_wsgi的版本。如果這不是Python 2.7，而是一個較老的Python版本，那麼可以得到這個特定的問題。

對於如何檢查什麼的mod_wsgi編譯使用：

http://code.google.com/p/modwsgi/wiki/CheckingYourInstallation#Python_Shared_Library

http://code.google.com/p/modwsgi/wiki/CheckingYourInstallation#Python_Installation_In_Use

它也可以看的mod_wsgi編譯什麼時候是Python中的有價值的檢查補丁級別版本的差異，以及對於。我確實記得在Python 2.7.1和2.7.2之間有這樣一個問題。

您的Python站點包位於/ usr/local之下，因此mod_wsgi很有可能在/ usr下使用不同的版本。

Answer 2

，以防有人絆倒此同時尋找在金字塔這一問題，並SQLAlchemy的：

與金字塔相結合，我有同樣的錯誤（「導入錯誤：無法導入名UTIL」）。經過試驗的時間和錯誤的唯一原因，原來，在production.ini我已經設置：

[server:main] 
use = egg:waitress#main 
host = 0.0.0.0 
port = 80 

我還對80端口的Apache2使用，似乎有些奇怪，這應該是相同的。將端口改爲例如6543，錯誤消失，WSGI服務器工作。在必要時，不需要apache2設置（WSGIPythonHome，WSGIPythonPath）。

顯然不相關，我不知道爲什麼端口衝突導致了這個錯誤，但它可能會幫助別人解決這個問題。