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Asked: 2026-06-13T20:22:52+00:00

I’m trying to create a basic blogging application in Python using Web.Py. I have

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I’m trying to create a basic blogging application in Python using Web.Py. I have started without a direcotry structure, but soon I needed one. So I created this structure:

Blog/
├── Application/
│   ├── App.py
│   └── __init__.py
|
├── Engine/
│   ├── Connection/
│   │   ├── __init__.py
│   │   └── MySQLConnection.py
│   ├── Errors.py
│   └── __init__.py
├── __init__.py
├── Models/
│   ├── BlogPostModel.py
│   └── __init__.py
├── start.py
└── Views/
    ├── Home.py
    └── __init__.py

start.py imports Application.App, which contains Web.Py stuff and imports Blog.Models.BlogPostModel, which imports Blog.Engine.Connection.MySQLConnection.
Application.App also imports Engine.Errors and Views.Home. All these imports happen inside contructors, and all code inside all files are in classes. When I run python start.py, which contains these three lines of code:

from Application import App
app = App.AppInstance()
app.run()

The following stack trace is printed:

Blog $ python start.py 
Traceback (most recent call last):
  File "start.py", line 2, in <module>
    Blog = App.AppInstance()
  File "/home/goktug/code/Blog/Application/App.py", line 4, in __init__
    from Blog.Views import Home
ImportError: No module named Blog.Views

But according to what I understand from some research, this should run, at least until it reaches something after App.py. Can anyone tell where I made the mistake? (I can provide more code on request, but for now I’m stopping here, as this one is getting messier and messier).

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1 Answer

  1. Editorial Team

    App.py contains the statement

    from Blog.Views import Home

    So Blog needs to be among the list of directories Python searches for modules (sys.path). That can be arranged in various ways.

    1. Since you are starting the app with python start.py, the directory
      containing start.py is automatically added to the search path. So
      you could change

      from Blog.Views import Home

      to

      from Views import Home

    2. Another option would be to move start.py up one level, out of the
      Blog directory. Then when you call python start.py, the
      directory containing start.py will also be the directory
      containing Blog. So Python would find Blog when executing from
      Blog.Views ...

    3. Finally, you could add the Blog directory to your PYTHONPATH environment
      variable.

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