Questions tagged [index]

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CS50 Finance: Index - list indices must be integers or slices, not str

I've been stuck on this for quite some time. I believe that I'm getting back data in the form of a dictionary but can't figure out how to get the information that I need. Error messages that have ...
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1answer
101 views

Pset7 Finance Unable to Buy Multiple Shares

I am able to make 1 purchase which appears on my index page, however if I try buy any further stocks my cash goes down but the stocks are not shown and aren't inserted into my portfolio. Here is my ...
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2answers
166 views

Pset7 => “NoneType” error on SELECT query (2017)

I’m really stuck on the index part of PSET7…. Flask keeps iterating over the following SELECT query: dab = db.execute("SELECT SUM(share) FROM portfolio WHERE symbol = :symbol AND user_id = :user_id",...
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1answer
56 views

Pset8 Finance personal touch

I decided to go with trading from index without manually typing the symbol. Also, I decided to simply go to the buy/sell page with the symbol pre-selected by a GET method (without quantities being ...
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2answers
35 views

Finance - Index showing correct number of rows but all the same record. For- loop issue?

So I've been looking at this all morning and can't figure what I'm doing wrong. All my variables are producing the correct values so it seems to be something to do with my For loop. In the html ...
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1answer
125 views

pset7 index function won't iterate through stocks

I'm having some serious trouble getting the index function to iterate through each of the user's stocks to obtain the current market price. It correctly outputs a list of the user's stocks along with ...
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1answer
490 views

Problem retrieving index variables in finance

The table is not able to access different variables to display in the table. Here is the index function def index(): """Show portfolio of stocks""" """Selecting shares that have been purchased ...
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1answer
148 views

pset7 index TypeError: 'NoneType' object is not subscriptable error

Me again with this error. I do not know what happened, this has been working for a couple of weeks and I have not changed the code (though I did copy and paste it) but all of a sudden this afternoon I ...
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1answer
524 views

pset7 index fields are empty in page

When I logged into the webpage and bought a stock, the price of the stock was deducted from the cash balance. However, the details of all the other fields are missing as shown in the picture below. I ...
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1answer
108 views

cs50 pset7 finance always get an error in valid buy execution;;;;;

@app.route("/") @login_required def index(): """Show portfolio of stocks""" cash = db.execute('SELECT cash FROM users where id=:id',id=session["user_id"]) cash = cash[0]["cash"] stocks ...
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1answer
287 views

pset7 - Buy doesn't return correct value

I've ran into an issue while running Check50 on what I thought was my functioning solution for pset7, namely it doesn't find the correct value in the index after trying to run the buy function. This ...
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2answers
293 views

Querying portfolio for index route PSET7/C$50 Finance/index

I have created a table named "portfolio" in my database which stores users purchase data while I kept the user_id field of this table NOT UNIQUE ie no primary key so as to let the user buy more same ...
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1answer
339 views

Pset7 Index not outputting some fields in table

I am in desperate need of help, since the index method is the last method I have left to finish for this pset! So far, my index code works partially - as in, only the values I passed in from my ...
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1answer
100 views

Problem with Total (stock price * number of shares) and Number of Shares Value in Portfolio on Index

Just recently, on my implementation of CS50 Finance, I bought 4 shares of Netflix, and then another 2, but instead of showing 6 shares on the Portfolio, it's only showing 2.  The "Total" value for the ...
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1answer
99 views

question about pset7 transferring variables to html

Here is my code: https://gist.github.com/a97f6c4eb5a834f2c99fe9e5f1e919ee Getting this error message: AttributeError: 'dict' object has no attribute 'startswith' Anywhere I can understand better ...
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1answer
40 views

Problem with pointers, getting seg fault while indexing with variable instead of plain number

I would like to ask why is that giving me seg fault. int **a = (int**) malloc (sizeof(int*) * 3); a[0][0] = 1; a[0][1] = 2; a[0][2] = 3; for(int i = 0; i < 3; i++) { printf("%d",...