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Python Build a Social Network with Flask Broadcasting Stream Templates

Posted by annecalija
annecalija
9,031 Points

Getting ImportError: cannot import name when trying to separate models to different files. Help!

I tried to separate the contents of the models.py to separate files.

Originally we had models.py(database, User and Post). Now, I have the following:

.
+-- app.py
+-- forms.py
+-- templates
+-- static
+-- models
|   +-- user.py
|   +-- post.py
+-- common
|   +-- database.py

As a result of the separation, the two classes User which are in models.user.py and Post in models.post.py are now importing each other. (sort of cyclic dependency)

Moreover, I could not make the app work anymore now that the "stream" feature is now implemented. Traceback (most recent call last):

  File "app.py", line 5, in <module>
    import forms
  File "C:\social_network_app\forms.py", line 6, in <module>
    from models.user import User
  File "C:\social_network_app\models\user.py", line 8, in <module>
    from models.post import Post
  File "C:\social_network_app\models\post.py", line 4, in <module>
    from models.user import User
ImportError: cannot import name 'User'

How to resolve this?

Thanks in advance.

Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

Do you have an __init__.py file in both the common and models directories? The file can be empty.

1 Answer

Patriot Rika
Patriot Rika
3,739 Points
Patriot Rika
Patriot Rika
3,739 Points

I have the same problem, this is how my files are . app.py forms.py templates static models database.py init.py (empty) sc (the venv)

This is what i get

Traceback (most recent call last): File "C:\Users\Admin\Py_Projects\Social_Network_Python\app.py", line 7, in <module> import forms File "C:\Users\Admin\Py_Projects\Social_Network_Python\forms.py", line 6, in <module> from models import User File "C:\Users\Admin\Py_Projects\Social_Network_Python\models.py", line 62, in <module> class Post(Model): File "C:\Users\Admin\Py_Projects\Social_Network_Python\models.py", line 66, in Post related_name='posts' TypeError: init() missing 1 required positional argument: 'model'

Thank you in advance for your help