我试图使我的Flask应用程序在CentOS服务器上工作。基本上，问题是我安装了python 2.6，/usr/bin这是系统默认值，而Python
3.4则安装在/usr/local/bin。我想对mod_wsgi使用Python 3.4 virtualenv或至少Python
3.4解释器来运行我的应用程序。

我在中创建了virtualenv ~/virtualenvs/flask。

我有这个WSGI脚本：

import os
import sys
from logging import Formatter, FileHandler

APP_HOME = r"/home/fenikso/Album"


activate_this = os.path.join("/home/fenikso/virtualenvs/flask/bin/activate_this.py")
execfile(activate_this, dict(__file__=activate_this))

sys.path.insert(0, APP_HOME)
os.chdir(APP_HOME)

from app import app

handler = FileHandler("app.log")
handler.setFormatter(Formatter("[%(asctime)s | %(levelname)s] %(message)s"))
app.logger.addHandler(handler)
application = app

并在Apache中进行以下配置：

<VirtualHost *:80>
        ServerName album2.site.cz
        Alias /static "/home/fenikso/Album/static"
        Alias /photos "/home/fenikso/Album/photos"
        Alias /thumbs "/home/fenikso/Album/thumbs"
        WSGIScriptAlias / "/home/fenikso/Album/wsgi.py"
        <Directory "/home/fenikso/Album">
            AllowOverride None
            Allow from all
        </Directory>
        <Directory "/home/fenikso/Album/static">
            AllowOverride None
            Allow from all
        </Directory>
        <Directory "/home/fenikso/Album/photos">
            AllowOverride None
            Allow from all
        </Directory>
        <Directory "/home/fenikso/Album/thumbs">
            AllowOverride None
            Allow from all
        </Directory>
</VirtualHost>

但是，当尝试运行该应用程序时，出现错误：

Apache/2.2.15 (Unix) DAV/2 mod_wsgi/3.2 Python/2.6.6 mod_fcgid/2.3.7 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips SVN/1.6.11 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
mod_wsgi (pid=14627): Target WSGI script '/home/fenikso/Album/wsgi.py' cannot be loaded as Python module.
mod_wsgi (pid=14627): Exception occurred processing WSGI script '/home/fenikso/Album/wsgi.py'.
Traceback (most recent call last):
   File "/home/fenikso/Album/wsgi.py", line 15, in <module>
     from app import app
   File "/home/fenikso/Album/app.py", line 1, in <module>
     from flask import Flask
 ImportError: No module named flask

我注意到有Python 2.6正在运行，而我的virtualenv没有被激活。什么是使它正常工作并将Python 2.6设置为系统默认值的正确方法？