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Problem with Updated CS50 Finance - all API calls to lookup stocks come back as None

I'm a high school teacher and have been teaching CS50 AP for about 7 years now. I like to make sure that I have a handle on all of the problem sets before going over them with my students. So, when I ...
Brian Smith's user avatar
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0 answers
48 views

PSet 9 check not working

Evening, I am getting the following error trying to run check on PSet9. I have downloaded a new empty version tested that and get the same error. I'm thinking this is a fault on the CS50 side but if ...
faarn's user avatar
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0 votes
2 answers
84 views

PSet 9 Sell handles valid sale expected to find "56.00" in page

Like others I have become stuck with the above error, although the site seems to display the correct info, any help would be appreciated: Python Flask Code: @app.route("/") @login_required ...
faarn's user avatar
  • 13
1 vote
2 answers
59 views

Week 9 - Finance - Foreign Key Mismatch

I'm trying to solve this issue for a week and nothing works! in my /buy route, I cannot update the users table with updated cash after a "buy" order is submitted. Here is an example of what ...
Julia 's user avatar
  • 21
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1 answer
35 views

why does "world" not show up when did not enter name in the form?

i followed the instructions very closely. When i do enter a name it works just fine. However, when i do not enter it, "world" did not show up. only the "hello, " part. This was ...
TrytoLearn's user avatar
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0 answers
53 views

Why does my server says it is a "bad request"?

Everytime I hit the submit button after inserting values, my server gives this message:# Bad Request The browser (or proxy) sent a request that this server could not understand. What does that mean? ...
user40089's user avatar
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0 answers
24 views

do not get the chance to fill out any input and select fields

Everytime I run flask run and go to the website, I cant see any of the input fields. Instead, I get the message 'must contain a number'.What am I doing wrong? {% extends "layout.html" %} {% ...
user40089's user avatar
0 votes
1 answer
253 views

Lecture 9, how to get default value from `flask.request.get` after submitting a form?

In Lecture 9, we learnt about Flask. Prof David taught us in the first couple sections by creating a Python file called app.py, and two similar HTML files that have different code in their bodies, ...
Mohammad muazzam ali's user avatar
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0 answers
61 views

Problem 9: Finance - flask run error

When I enter flask run in the command line it appears to give the normal response but when I click on the link provided in the terminal, it opens a page in firefox titled: "problem loading page&...
robonozzo_39's user avatar
0 votes
1 answer
87 views

Check50 PSET9 Finance Failing Throughout

First post here...seems I'm coming unstuck at the pointy end of the course. Hahaha! My code doesn't seem to be passing Check50 through Quotes/Buy/Sell - although the functionality seems to be fine ...
Jumbot's user avatar
  • 3
0 votes
2 answers
109 views

TypeError: 'NoneType' object is not subscriptable in PSET9, but working manually

I am working on pset9 Finance. I have implemented the functionality for purchasing stocks, and it works well when I manually test it. However, when I run the CS50's check50 validation, it returns an ...
Chris's user avatar
  • 31
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1 answer
333 views

CS50 2023 Finance Check50 issue

There is no way to get rid of the following check50 error: :( logging in as registered user succeeds application raised an exception (see the log for more details) I found through googling that in ...
RaulMuroc's user avatar
0 votes
1 answer
78 views

Finance app - object is not subscriptable

I have problems with pset 9 finance. Since days I try to figure out what is wrong with my code for the sell route. I know that there a handfull of similar questions on StackExchange/StackOverflow but ...
Karl's user avatar
  • 5
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0 answers
55 views

In 'Finance' how do I get the page to load?

I have not been able to get any page to load for the Finance problem (even without me messing about with it!). I tried deleting everything and starting again like so: $ wget https://cdn.cs50.net/2021/...
Michael's user avatar
0 votes
1 answer
88 views

PSET9 FINANCE SQLITE "no such column exists" while multiplying two columns to update a third

In the Index function on APP.PY of my finance code, I'm getting "RuntimeError: no such column: total_per_share" even though I'm using "AS" to create this column -- please advise. @...
General Noob's user avatar
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2 answers
4k views

AttributeError: 'function' object has no attribute 'method'

Hey guys I've been working on my final project. I keep running into this error When I run flask, this error occurs File "/home/ubuntu/project/app.py", line 88, in login if request.method == &...
Lychee Tree's user avatar
0 votes
1 answer
197 views

Flask/Python PSET9 Finance -- Using PRINT() to debug

Having some problems with INDEX that I figure printing variable content to console will help me solve. BUT no matter what I try, print(variable) doesn't result in anything at all on the console/...
General Noob's user avatar
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1 answer
285 views

Lab9 -- Buttons to delete DB entries don't work

Can anyone please tell me why my "Remove Entry" from DB buttons don't work? I included the python.app code below the HTML: <!DOCTYPE html> <html lang="en"> ...
General Noob's user avatar
0 votes
1 answer
63 views

Should I deploy flask app for the final project?

I’m working on a final project, which is a web application using Flask. For it to be graded, should I deploy it on Heroku or only submit my source files. I’m not familiar with Heroku, and from what I ...
roman465's user avatar
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0 votes
2 answers
128 views

Is there a way in jinja to display a block in a specific page?

I have a layout.html page with a <footer> that I want to display in almost all pages using {% extends "layout.html %}. Only in the user profile page the footer will be different. How can I ...
Kley Halisson's user avatar
0 votes
1 answer
769 views

Flask Filter Search/List in Python

I created a country list on the python search page section, the data is sent to the Html table with jinja syntax “ The Html table also has a JavaScript function it functions correctly no help with ...
Matrix's user avatar
  • 67
0 votes
1 answer
1k views

jinja code not working inside html file

I am using flask for the first time and jinja code is being displayed on the webpage. this is my html file: <!DOCTYPE html> <html lang="en"> <head> ...
Pragati Chauhan's user avatar
1 vote
1 answer
1k views

PSET9 / can't check until a frown turns upside down

I am getting this message in the following checks :| sell page has all required elements/ :| sell handles invalid number of shares :| sell handles valid sale I guess the problem is in by sell or buy ...
Aleksei Díaz's user avatar
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0 answers
121 views

ADD EXTRA CASH IN FINANCE

Trying to add extra cash to my pset finance. I have made as you can see below in the picture, that is adding an extra part of code to the index function(), but I'm just getting a 404 answer. Why is it ...
LUISELLA's user avatar
0 votes
1 answer
2k views

Check if query returns empty value

I am trying to check using (IF / ELSE) if my query returns any value. What is the simplest way to do this? Thanks result = db.execute("SELECT * FROM home WHERE id = ? AND name = ?", str(conn)...
Code Maker's user avatar
0 votes
1 answer
275 views

Runtime Error Unsupported Value in pset9 Finance

I'm doing Pset09 "Finance" and I have been stuck in the "index" function for quite a while. I tried to use the already existing "trans" table but I am getting an error. ...
Abdul's user avatar
  • 3
0 votes
1 answer
2k views

Calling a javascript function from flask

For my final project, I am creating a flask web mapping application, which with user input displays different things on a map. At the moment, when they input a place name via a form, my python ...
Stuey17's user avatar
  • 103
1 vote
1 answer
141 views

pset9 // register function not registering user

I am having this problem with my register function in pset9 when i register on the web app it says error 500 internal server error and when i check my terminal it says: return self.view_functions[rule....
Arsham's user avatar
  • 27
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0 answers
359 views

What's wrong with my register function? (Pset9 - Finance)

Here's my register function in application.py: @app.route("/register", methods=["GET", "POST"]) def register(): """Register user""" ...
Rodri-97's user avatar
0 votes
2 answers
535 views

CS50 IDE gives error for flask run

I was able to run flask run till yesterday. But today it is not working, it has been giving errors for SQL and I have been able to code today. It gives me this error continuously. ERROR: Error on ...
TSPR 810's user avatar
0 votes
1 answer
856 views

Generate dynamic datefields from selected dropdown value sent to another route in Flask

EDIT With the good help of @DinoCoderSaurus, I realised that I overlooked adding a POST method to the datainput form and the routes also lacked GET and POST methods. Adding those modifications helped ...
EddyBeor's user avatar
0 votes
1 answer
234 views

Can't update shopping cart for more than one item, works fine for a single item, otherwise only the first one gets updated

I am trying to update the quantity of the products in the shopping cart by changing the number in the dropdown. If the cart has two or more items then only the first one works and the qty doesn't ...
user14720865's user avatar
0 votes
1 answer
188 views

Blocked on C$50 Finance suggested personal touch feature - adapting index page to enable transactions in situ

Dug into the docs and trawled all the usual online sources but starting to suspect that I'm trying to solve this in a way that's impossible! This is how I've edited the index page to allow user input ...
Sion Williams's user avatar
0 votes
1 answer
97 views

Final Project: Problem to UPDATE table (Flask and SQLite) - RuntimeError ("unsupported value: {}".format(value))

I'm working on a project tracking web app, in which users can create and categorise their own projects. There are more options, but a project can mainly be categorised as active or paid/finished. Any ...
AlonsoLo's user avatar
0 votes
0 answers
758 views

Problem with endblock tag in finance. "endblock" tag unknown

{% extends "layout.html" %} {% block title %} Quote {% endblock %} {% block main %} <form action="/quote" method="post"> <div class="form-...
catnamedboo's user avatar
0 votes
0 answers
3k views

raise JSONDecodeError("Expecting value", s, err.value) from None json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

@app.route('/api/<string:isbn>', methods = ['GET']) def isbn(isbn): #import api from Goodreads (stats) book_data = db.execute("SELECT * FROM books WHERE isbn=:isbn",{'isbn':isbn})....
Haa's user avatar
  • 1
0 votes
0 answers
29 views

Final Project: dynamic page creation to show just 10 SQL entries per page

I'm developing a web-page for my CS50's Final Project for contacting japanese students around Argentina. The only official japanese exam takes place in Buenos Aires, and there are no many good places ...
Lautaro D. Futuro's user avatar
1 vote
2 answers
3k views

Finance: UNIQUE constraint failed: users.username

I've been struggling with this for days. Ignore the '1234' hardcoded into the "insert into" line, just using that to isolate problems. The problem I'm facing is with the username being ...
Brandon Zemel's user avatar
0 votes
1 answer
543 views

RuntimeError: missing value for placeholder (:name)

all! I'm doing the final project, and I have a form whose contents I'm trying to submit to a database. My python code is: @app.route("/Contact.html", methods=["GET", "POST"]) def Contact(): if ...
Diaresta's user avatar
0 votes
0 answers
21 views

Join table seems showing an error

I tried this statement on the adminer postgreSql database online database query tool and works but when i try to code it into my FLASK app showing nothing. lists = db.execute("SELECT b.isbn,b.author,...
Eyasu G's user avatar
0 votes
1 answer
117 views

Nesting SQL queries in Flask (final project)

I've been trying to only insert new ids if they weren't inserted before in my database, but the problem I've been having is that I couldn't get the nested queries to work in Python Flask. Whatever I ...
M Husseini's user avatar
2 votes
1 answer
3k views

Flask Sessions Not Working

I'm using VS Code and following along Brian's Flask class in Web50. I have copied his notes program word for word, and somehow I get different results. I've downloaded Flask and Sessions, so that's ...
luk020's user avatar
  • 23
0 votes
0 answers
58 views

Trying to flask run the task session on the CS50 web Lecture DATABASE issue

I had a great time learning about HTML and CSS. Then came this intimidating flask feature. I was able to create a session["username"] to login and logout. I'm trying to use session to create a todo ...
NgKen0995's user avatar
0 votes
1 answer
89 views

Internal Error Served if user doesn't own any shares or sell all his shares in Finance

When i sell all the shares i own or even in the case of a new registered user who doesn't own any shares; it doesn't redirect to "/" i.e the main index page but serves me an internal error. It works ...
Divij Jain's user avatar
0 votes
1 answer
291 views

Unsure of what my DATABASE_URL is

I am using windows 10 (64-bit) and am following the course "Web Programming with python and Javascript" in CS50, in which i wanted to use my computer as a local host to store the table content. I am ...
Najaaz's user avatar
  • 101
0 votes
0 answers
155 views

Deleting SQL dynamically with Flask

I want to delete a specific row in my database but I don't know how to do it. On my HTML I have this: <div class="cases"> {% for row in rows %} <div class="card border-success mb-...
Ricardo Gusi's user avatar
0 votes
0 answers
2k views

(psycopg2.errors.UndefinedTable) relation "users" does not exist

when i try to load up regster.html i get this error "sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedTable) relation "users" does not exist LINE 1: INSERT INTO users(username,password) ...
beatmaister's user avatar
0 votes
0 answers
706 views

CS50W: "flask.cli.NoAppException" Can anyone explain this?

flask.cli.NoAppException: While importing "application", an ImportError was raised: Traceback (most recent call last): File "c:\users\hp\appdata\local\programs\python\python38\lib\site-packages\flask\...
pooja's user avatar
  • 1
0 votes
1 answer
2k views

error while trying to update database using python and sqlalchemy

While I was trying to run create.py file having the following code: import os from flask import Flask, render_template, request from models import * app = Flask(__name__) app.config["...
Ayush Bansal's user avatar
0 votes
0 answers
192 views

How to ensure proper database url in environment variable?

I am trying to run the code from lecture3 and I am having trouble ensuring the database url is properly set using the environment variable. Here's the code: db_url = 'postgresql+psycopg2://{username}:...
S. Miller's user avatar
  • 101