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Python從wsgi導(dǎo)入失敗的問題解決方法

 更新時間：2025年04月23日 10:39:47   作者：qq^^614136809  
本文主要介紹了Python從wsgi導(dǎo)入失敗的問題解決方法,文中通過示例代碼介紹的非常詳細(xì),對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值,需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧

在一個apache2/flask服務(wù)器上，有一個文件夾結(jié)構(gòu)如下：

/var/www/myapp
/var/www/myapp/routing.py
/var/www/myapp/__init__.py
/var/www/wsgi-scripts/myapp.wsgi

myapp文件夾中的應(yīng)用程序文件(routing.py)如下：

from flask import Flask, render_template
app = Flask(__name__)

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


if __name__ == '__main__':
    app.debug = 'True'
    app.run()

wsgi-scripts中的myapp.wsgi文件如下：

import sys
sys.path.insert(0, '/var/www/myapp')
from myapp import routing as application

但是當(dāng)我加載頁面時，日志中出現(xiàn)以下錯誤：

[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23574): Target WSGI script '/var/www/wsgi-scripts/myapp.wsgi' cannot be loaded as Python module.
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23574): Exception occurred processing WSGI script '/var/www/wsgi-scripts/myapp.wsgi'.
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] Traceback (most recent call last):
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11]   File "/var/www/wsgi-scripts/myapp.wsgi", line 3, in <module>
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11]     import myapp.routing as application
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] ImportError: No module named myapp.routing
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23575): Target WSGI script '/var/www/wsgi-scripts/myapp.wsgi' cannot be loaded as Python module.
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23575): Exception occurred processing WSGI script '/var/www/wsgi-scripts/myapp.wsgi'.
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] Traceback (most recent call last):
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11]   File "/var/www/wsgi-scripts/myapp.wsgi", line 3, in <module>
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11]     import myapp.routing as application
[Fri Mar 15 08:06:32 2013] [error] [client 192.168.1.11] ImportError: No module named myapp.routing
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23577): Target WSGI script '/var/www/wsgi-scripts/myapp.wsgi' cannot be loaded as Python module.
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23577): Exception occurred processing WSGI script '/var/www/wsgi-scripts/myapp.wsgi'.
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] Traceback (most recent call last):
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11]   File "/var/www/wsgi-scripts/myapp.wsgi", line 3, in <module>
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11]     import myapp.routing as application
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] ImportError: No module named myapp.routing
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23573): Target WSGI script '/var/www/wsgi-scripts/myapp.wsgi' cannot be loaded as Python module.
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] mod_wsgi (pid=23573): Exception occurred processing WSGI script '/var/www/wsgi-scripts/myapp.wsgi'.
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] Traceback (most recent call last):
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11]   File "/var/www/wsgi-scripts/myapp.wsgi", line 3, in <module>
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11]     import myapp.routing as application
[Fri Mar 15 08:06:33 2013] [error] [client 192.168.1.11] ImportError: No module named myapp.routing

解決方案

問題的原因是Python從wsgi導(dǎo)入失敗，可能是因為以下原因：

  • myapp.routing模塊沒有被正確導(dǎo)入。
  • myapp.routing模塊沒有被正確定義。

方法一：

第一個答案中給出的解決方案是：

  • 直接導(dǎo)入routing模塊，而不是myapp.routing模塊。
  • 將application定義為一個函數(shù)，而不是一個模塊。

代碼示例：

# myapp.wsgi
import sys
sys.path.insert(0, '/var/www/myapp')

from routing import app as application

# routing.py
def app(environ, start_response):
    app.debug = 'True'
    app.run()

方法二：

第二個答案中給出的解決方案是：

  • 使用site.addsitedir()函數(shù)將myapp目錄添加到Python的包路徑中。
  • 使用sys.path[:] = new_sys_path將新路徑放在Python的包路徑的前面。

代碼示例：

# myapp.wsgi
ALLDIRS = ['/var/www/myapp/']

import sys 
import site 

# Remember original sys.path.
prev_sys_path = list(sys.path) 

# Add each new site-packages directory.
for directory in ALLDIRS:
  site.addsitedir(directory)

# Reorder sys.path so new directories at the front.
new_sys_path = [] 
for item in list(sys.path): 
    if item not in prev_sys_path: 
        new_sys_path.append(item) 
        sys.path.remove(item) 
sys.

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