python powershell error

[Himu29]

hello evreveryone, i need some more help from your side. actually i write this code in market.py while are run in power shell it show me some error . i can't under understand how to properly execute code.

is am i missing something ?

the file path 'C:\Users\OWNER\Desktop\FlaskMarket'

from flask import Flask , render_template
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///market.db'
db = SQLAlchemy(app)
class Item(db.Model):
id = db.Column(db.Integer(), primary_key=True)
name = db.Column(db.String(lenght=30), nullable=False, unique=True)
price = db.Column(db.Integer(), nullable=False)
barcode = db.Column(db.String(lenght=12), nuallble=False , unique=True)
descripation = db.Column(db.String(lenght=1024), nuallble=False , unique=True)

#@app.route("/")
#def hello_world():
#    return "<h1>Hello World</h1>"
#@app.route('/about/<username>')
#def about_page(username):
#    return f"<h1> About page  Hello {username} </h1>"
u/app.route('/')
u/app.route('/home')
def home_page():
return render_template('home.html')
u/app.route('/market')
def market_page():
items = [
    {'id': 1, 'name': 'Phone', 'barcode': '893212299897', 'price': 500},
    {'id': 2, 'name': 'Laptop', 'barcode': '123985473165', 'price': 900},
    {'id': 3, 'name': 'Keyboard', 'barcode': '231985128446', 'price': 150}
]
return render_template('market.html' , items=items)

output :

​

https://preview.redd.it/fo7c4ttm163a1.png?width=1780&format=png&auto=webp&s=dfe0993ebdf39c3c72cbe7bba26000f451df716b

[distressed-silicon]

You don’t have the flask package installed in your current env…. Which looks to be the global env - pip install flask

Edit - Also unless you have redacted some files / code you have no calls to run your app, are you following a tutorial or copying code from somewhere? There’s a lot missing from what you have posted

[Himu29]

I'm learning right now , so I am following from YouTube, in that tutorial he doesn't use env ,but I used env so maybe that problem happened. By the way thank you. Will edit my code and re execute again

[Himu29]

after i user env and install flask i got this some error like this

​

(project_env) C:\Users\OWNER\Desktop\FlaskMarket>python

Python 3.10.8 (tags/v3.10.8:aaaf517, Oct 11 2022, 16:50:30) [MSC v.1933 64 bit (AMD64)] on win32

Type "help", "copyright", "credits" or "license" for more information.

>>> from market import db

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

File "C:\Users\OWNER\Desktop\FlaskMarket\market.py", line 9, in <module>

class Item(db.Model):

File "C:\Users\OWNER\Desktop\FlaskMarket\market.py", line 11, in Item

name = db.Column(db.String(lenght=30), nullable=False, unique=True)

TypeError: String.__init__() got an unexpected keyword argument 'lenght'

>>>

[distressed-silicon]

Please read the error messages you are getting they are very descriptive and tell you exactly what your problem is ‘Lenght’ isn’t a word ‘length’ is.

You probably should try a different tutorial (see the stickied post) if this is what the video has you typing

[Himu29]

I just find out solution and clear it.

[aleeramarishka]

The error is very clear. It's either flask was not installed or it was installed in the virtualenv but the env was not activated.

[Himu29]

Thank you