#🔒 Organising project
amber sage
desert anvil
The flaskr project is laid out like this:
So there's only Python files, the sql schema and templates in the flaskr package
amber sage
mine looks okay then
desert anvil
(A Python package is a directory with an __init__.py in it, btw)
amber sage
i moved schema into it
amber sage
(A Python package is a directory with an `__init__.py` in it, btw)
thats actually a good bit of info, thanks
desert anvil
And a module is a Python file
amber sage
ahh so a package contains modules
fallow arrow
(A Python package is a directory with an `__init__.py` in it, btw)
what is a "library" then? a published package?
fallow arrow
ahh so a package contains modules
and also sub-packages (technically)
desert anvil
what is a "library" then? a published package?
Not really a Python term in the same way
amber sage
and so a library is from package import module
fallow arrow
thats an import statement
desert anvil
and so a library is `from package import module`
No, "library" is not a Python term
amber sage
No, "library" is not a Python term
okay
anyway
im still getting warnings
so i assume i need to change something
desert anvil
Verify that you can run flask first
desert anvil
Try flask --app darts_project run
amber sage
Ah, you have to recreate the venv
amber sage
whats the command for that again
desert anvil
rmdir /s darts_league_app\.venv
python -m venv darts_league_app\.venv
darts_league_app\.venv\Scripts\activate
pip install flask
this is gonna create a venv named darts_league_app
oh no a venv inside another dir called darts_league_app
amber sage
right let me try running flask
Try 'flask run --help' for help.
Error: Could not import 'darts_project'.
How'd you run it?
amber sage
Try `flask --app darts_project run`
this
desert anvil
What directory are you in?
amber sage
What directory are you in?
darts_league_app
desert anvil
Can you push up your changes?
desert anvil
Ah
You named the subdirectory darts-project, but it has to be darts_project
With an underscore instead of a hyphen
desert anvil
Ok, so the problem is that when you run flask, you get the app instance as defined in __init__.py, but not the code that adds the routes in app.py. You can import the routes into the __init__.py file with
from . import app
but then you get a name clash, because you have the object "app", but also a module named "app" (i. e. the file app.py), so I recommend you rename the app.py file to routes.py (because it contains routes) and then import it like
from . import routes
``` in `__init__.py`done
let me try that
Traceback (most recent call last):
File "C:\Users\georg\OneDrive\Documents\GitHub\darts_league_app\.venv\Lib\site-packages\flask\cli.py", line 245, in locate_app
__import__(module_name)
~~~~~~~~~~^^^^^^^^^^^^^
File "C:\Users\georg\OneDrive\Documents\GitHub\darts_league_app\darts_project\__init__.py", line 3, in <module>
from . import routes
File "C:\Users\georg\OneDrive\Documents\GitHub\darts_league_app\darts_project\routes.py", line 3, in <module>
from darts_project import app
ImportError: cannot import name 'app' from partially initialized module 'darts_project' (most likely due to a circular import) (C:\Users\georg\OneDrive\Documents\GitHub\darts_league_app\darts_project\__init__.py)
my bad actually
i don't think i put .
should i put from darts_project.routes import routes
desert anvil
from . import routesshould work
amber sage
yeah im getting an error with it
desert anvil
what error?
Aaah
Now I get it
Can you show me what your routes.py file looks like?
amber sage
# app.py
from flask import Flask, render_template, request, redirect, url_for, flash, session
from darts_project import app
from darts_project.db import get_db
# When flask recieves this request, it will call the index function
@app.route('/')
def index():
return render_template('index.html')
@app.route('/admin', methods=('GET', 'POST'))
def admin():
if '_flashes' in session:
session['_flashes'].clear()
if request.method == 'POST':
teamname = request.form['teamname']
error = None
if not teamname:
error = 'Team name is required.'
if error is not None:
flash(error)
else:
db = get_db()
db.execute('INSERT INTO teams (teamname) VALUES (?)', (teamname,))
db.commit()
return redirect(url_for('index'))
return render_template('admin.html')
thats what it looks like right now
desert anvil
and __init__.py?
amber sage
# Makes app available for all modules in the package
from flask import Flask
from . import routes
app = Flask(__name__)
app.secret_key = 'eca17809-c94d-4963-a894-b8220b348f86'
Ah, you have to put the routes import at the end
after you create app
Should've made that clear
amber sage
ohh okay
# Makes app available for all modules in the package
from flask import Flask
app = Flask(__name__)
from . import routes
app.secret_key = 'eca17809-c94d-4963-a894-b8220b348f86'
like that?
i'm so used to importing at the start haha
desert anvil
I think so...
amber sage
let me try
desert anvil
I'd put it at the bottom, but it's probably fine.
amber sage
woohoo
desert anvil
Alright, so do you still see the warning?
desert anvil
Ok, did vscode select the Python interpreter in the venv?
amber sage
must be a mental thing 😂
amber sage
Ok, did vscode select the Python interpreter in the venv?
must have
i'm pretty sure it has
desert anvil
You can see it here:
amber sage
yeah 3.13.3 venv
desert anvil
Alright, that's good
You always wanna have the interpreter in the current venv selected
Otherwise you'll get missing import warnings and other weird behavior
slim scarabBOT
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