I'm designing a website. The project structure is
project\
back_end\
__init.py__
main.py
In init.py,
from flask import Flask
def create_app():
app = Flask(__name__)
return app
In main.py
from back_end import create_app
app = create_app()
@app.route("/")
def home():
return "hello world"
When I hit run in VS Code, there is error ModuleNotFoundError: No module named 'back_end'.
I type python -m back_end.main in the command line, the code works. I also tried to rename the back_end package to b. The error still persists. Is it related to defining an environment variable? I am using Ubuntu 24.04.
One, it is __init__.py not __init.py__.
Two, your main.py file needs to be in your project/ directory, not project/back_end/. A revised file structure would look like this:
project\
back_end\
__init__.py
main.py
Also, for a simple project like the structure you described, you wouldn’t need to have multiple files like that. A single main.py file would easily suffice.