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Flask问题求助 No module named XXX怎么解决

第一个flask项目,做一个简单的网址导航。部署项目后,浏览器访问报500错误。查看apache日志后,报错如下:

[Tue Jan 06 09:58:22 2015] [error] hello world
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131] mod_wsgi (pid=31615): Target WSGI script '/var/www/qianshan/qianshan.wsgi' cannot be loaded as Python module.
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131] mod_wsgi (pid=31615): Exception occurred processing WSGI script '/var/www/qianshan/qianshan.wsgi'.
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131] Traceback (most recent call last):
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131]   File "/var/www/qianshan/qianshan.wsgi", line 12, in <module>
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131]     from qianshan import app as application
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131]   File "/var/www/qianshan/__init__.py", line 4, in <module>
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131]     import extras
[Tue Jan 06 09:58:22 2015] [error] [client 112.64.71.131] ImportError: No module named extras

项目结构

qianshan
├── config.ini
├── extraModules.py
├── extras.py
├── __init__.py
├── qianshan.wsgi
├── static
├── templates
├── test.py
└── venv

init.py代码

from flask import Flask
from flask import render_template
import extraModules
import extras#如果没有这句无报错正常运行,只有一些静态资源没拉到,可能是其他问题
import ConfigParser
import codecs
import logging

logging.basicConfig(filename='qianshan.log', level=logging.INFO)
logging.info('Started')

app = Flask(__name__)

logging.info('App established')

@app.route("/")
def index():
    return render_template('index.html')

extras.py是实际我想要导入的模块,里面有两个我需要的类;extraModules是测试模块,import extraModules是成功的,apache日志的第一行也打出来了;他们的代码分别如下:

extras.py

# Filename : extras.py

class Block:
    def setNo(self, no):
        self.no = int(no)
    def getNo(self):
        return self.no
    def setName(self, name):
        self.name = name
    def getName(self):
        return self.name
    def setPriority(self, priority):
        self.priority = int(priority)
    def getPriority(self):
        return self.priority
    def setHotKeyAsc(self, hotKeyAsc):
        self.hotKeyAsc = hotKeyAsc
    def getHotKeyAsc(self):
        return self.hotKeyAsc
    def setElement(self, equation):
        s = equation.split(':')
        if(s[0] == 'no'):
            self.setNo(s[1])
        elif(s[0] == 'name'):
            self.setName(s[1])
        elif(s[0] == 'priority'):
            self.setPriority(s[1])
        elif(s[0] == 'hot_key_asc'):
            self.setHotKeyAsc(s[1])

class Website:
    def setNo(self, no):
        self.no = int(no)
    def getNo(self):
        return self.no
    def setName(self, name):
        self.name = name
    def getName(self):
        return self.name
    def setUrl(self, url):
        self.url = url
    def getUrl(self):
        return self.url
    def setIcon(self, icon):
        self.icon = icon
    def getIcon(self):
        return self.icon
    def setBlockNo(self, blockNo):
        self.blockNo = int(blockNo)
    def setPriority(self, priority):
        self.priority = int(priority)
    def getPriority(self):
        return self.priority
    def setHotKeyAsc(self, hotKeyAsc):
        self.hotKeyAsc = hotKeyAsc
    def getHotKeyAsc(self):
        return self.hotKeyAsc
    def setElement(self, equation):
        s = equation.split(':')
        if(s[0] == 'no'):
            self.setNo(s[1])
        elif(s[0] == 'name'):
            self.setName(s[1])
        elif(s[0] == 'url'):
            self.setUrl(s[1])
        elif(s[0] == 'icon'):
            self.setIcon(s[1])
        elif(s[0] == 'priority'):
            self.setPriority(s[1])
        elif(s[0] == 'hot_key_asc'):
            self.setHotKeyAsc(s[1])

if __name__ == '__main__':
    block = Block()
    website = Website()

extraModules.py

# Filename : extraModules.py
print 'hello world'

其他背景信息:
项目部署在digital ocean的ubuntu12.x主机上,python版本2.7.3.

还请指导下,是不是extras.py有什么地方大意了,小弟新学python不久,请多敲打点拨

谢谢1L和2L前辈的指点啊!白天一直在上课,以下为1月7日晚更新,我把wsgi以及virtual host的配置也发一下,wsgi中是有配置/var/www/qianshan/为sys.path的。

qianshan.wsgi

#!/usr/bin/python
activate_this = '/var/www/qianshan/venv/bin/activate_this.py'
execfile(activate_this, dict(__file__=activate_this))

import sys
import logging

logging.basicConfig(stream=sys.stderr)
sys.path.insert(0,'/var/www/qianshan/')
sys.path.insert(1,'/var/www/')

from qianshan import app as application
application.secret_key = 'Add your secret key'

Virtual Host配置

<VirtualHost *:80>
            ServerName qianshan.co
            ServerAdmin spark@qianshan.co
            WSGIScriptAlias / /var/www/qianshan/qianshan.wsgi
            <Directory /var/www/qianshan/>
                    Order allow,deny
                    Allow from all
            </Directory>
            Alias /static /var/www/qianshan/static
            <Directory /var/www/qianshan/static/>
                    Order allow,deny
                    Allow from all
            </Directory>
            ErrorLog ${APACHE_LOG_DIR}/error.log
            LogLevel warn
            CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

我会按照1L和2L的方法试试,如果不行再在这里说

将第四行修改为:
from qianshan import extras

问题已解决,是文件的权限问题。和import的语法无关。

非常感谢大家对我的帮助和指导!虽然这个问题搞了一周时间,但是我学习了很多。。。

下图中可以看到目前项目根目录下各个文件的权限,otherModules(就是之前的extras)对root所在的用户组没有读权限。

-rwx------ 1 root root 9091 Jan  3 09:27 config.ini
-rwxr--r-- 1 root root  404 Jan  7 22:58 __init__.py
-rwx------ 1 root root 2316 Jan  7 23:07 otherModules.py
-rwxr--r-- 1 root root  360 Jan  5 23:34 qianshan.wsgi
drwxr-xr-x 2 root root 4096 Jan  3 09:08 static
drwxr-xr-x 2 root root 4096 Jan  3 08:51 templates
-rw-r--r-- 1 root root  262 Jan  7 23:05 testModule.py
-rwx------ 1 root root 1716 Jan  3 09:36 test.py
drwxr-xr-x 6 root root 4096 Jan  3 08:05 venv

chmod调整权限后,权限如下,项目可以正常访问,不再报错

-rwxr--r-- 1 root root 9091 Jan  3 09:27 config.ini
-rwxr--r-- 1 root root  404 Jan  7 22:58 __init__.py
-rwxr--r-- 1 root root 2316 Jan  7 23:07 otherModules.py
-rwxr--r-- 1 root root  360 Jan  5 23:34 qianshan.wsgi
drwxrwxr-x 2 root root 4096 Jan  3 09:08 static
drwxrwxr-x 2 root root 4096 Jan  3 08:51 templates
-rw-r--r-- 1 root root  262 Jan  7 23:05 testModule.py
-rwxr--r-- 1 root root 1716 Jan  3 09:36 test.py
drwxr-xr-x 6 root root 4096 Jan  3 08:05 venv

很简单,看
qianshan【你这个文件夹并没有加在sys.path中
├── config.ini
├── extraModules.py
├── extras.py

另外,你在代码中也不能直接 import extras,至少也要带上包名:
import qianshan.extras as extras

...balabala

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