cs50/x

This is CS50

Raghav Awasthi

@RaghavAwasthi

Thanks @Blauelf

Akshay Kumar

@AkshayKumar007

In Project-2 for CS50-web, when I click on login button(which loads the list of contents), I get an error

TypeError: can't pickle _thread.RLock objects.

Following is the stack trace for error:
image1
As I can see it's something related to multithreading, and also error is being generated from packages, rather than my templates and applications. I have never done multithreading in python, and can't find a solution. Please help. thanks in advance.

MGD

@pvpizza

I'm working on the mario program from week 1. I've got the algorithm done. Just wanted to check how to take input as an int in c and how to print intergers using printf? Thank you

MGD

@pvpizza

Never mind, I figured it out

Ahmed Alsallum

@Ahmedalsa

Hey guys, can anyone help me with the project1 in CS50? Where do I get the file "books.csv"? and how do I add it to the import.py file?

jetemi

@jetemi

Hello guys, I have submitted my project0, however on the submit website, it says "no submission has been received yet"

jetemi

@jetemi

If you are still having issues submitting project0 for CS50's Web Programming with Python and JavaScript, you can reply to this post

If you are still having issues submitting project0 for CS50's Web Programming with Python and JavaScript, you can reply to this post

Here

Abdelrahman-Serag

@Abdelrahman-Serag

please guys anyone help me iam very disappointed and confused .. my probelm is iam in project 1 and i dont know where i can write th source code i download the git bash but i dont have any idea how to intercat with this comman that is first time i open it .. anyone tell me what i can do on this project ??

Blauelf

@Blauelf

@Abdelrahman-Serag Which course? And is there on project 0?

Abdelrahman44444

@Abdelrahman44444

@Blauelf course CS50W and it's on project1 I dont know where I can the project I don't understand

Blauelf

@Blauelf

But have you done project 0 yet? You mention git, which is same process over all the projects.
There are git tutorials out there, and git cheat sheets.
You can write code with whatever you like. Whether vim, or PyCharm, or IDLE, or Notepad++, sublime (list incomplete and in no particular order), doesn't matter at all, whatever floats your boat, you might have to configure it to use consistent indentation characters. What did you use for project 0?

Also, switching accounts might cause confusion.

Akshay Kumar

@AkshayKumar007

@Abdelrahman44444 I have done project1. As @Blauelf said, first download a text-editor like atom, sublime, vscode, etc. (in the course our instructor uses atom) and write your code. I would recommend you to create a 'virtual environment' and download all the packages, that are listed in 'requirments.txt'. Also, you can join CS50 Slack channel(instructor Brian Yu is there) as well. Hope it helped. Good day.

Ahmed Alsallum

@Ahmedalsa

guys I need help in project1 in cs50 web dev, the table 'books' has been created in the "PostgreSQL " host but no rows were added, can someone help me? check out the code:

guys I need help in project1 in cs50 web dev, the table 'books' has been created in the "PostgreSQL " host but no rows were added, can someone help me? check out the sql results:

ryboh1

@ryboh1

How active is this community?

Abdelrahman44444

@Abdelrahman44444

@Blauelf

@blauelf in project0 I used brackets editor to make html ,CSS ,Scss files and I have done it my problem is he told me that I download project1 files and open it in Terminal window that is the stuck I don't use ever any terminal window so that Iam confused where I will write my project and code

Abdelrahman44444

@Abdelrahman44444

@AkshayKumar007 ok I will do that and write my code in any editor but I first I read that I should open the file project1 and install flask and pip in Terminal window and run the codes in it so that what make me confused

Akshay Kumar

@AkshayKumar007

@Abdelrahman44444 Seems like you are new to Command Line interface(terminal). Can you tell me which OS are you using (Windows/ Linux/ MacOs). If you're using Linux or MacOS, I think these videos might help you.

(Command Line Tutorial)[https://www.youtube.com/watch?v=YHFzr-akOas&list=PLS1QulWo1RIb9WVQGJ_vh-RQusbZgO_As]

@ryboh1 Community is quite active. I would also recommend you to join CS50x Slack Group.

Abdelrahman44444

@Abdelrahman44444

@AkshayKumar007 yes don't have any idea about command line Iam using Windows os . In the first lecture of cs50W . No mentioned that how interact with this for new people

jetemi

@jetemi

@AkshayKumar007 can you please share the link to the slack group. I tried the one on EDx it was not active. Thanks

Tom Esch

@tomeschnyc

Windows uses Powershell

@jg-karl

Hey, does someone know when will be the next completed certificates authorized and pushed to edx? I have completed everything, yet cannot see my gradebook anymore and there is no certificate on dashboard either.

Blauelf

@Blauelf

No gradebook? Are you talking about CS50x? And do you mean the one at https://cs50.me/cs50x ?

@jg-karl

Yep, but I did it probably with the older version. So there are no submissions. Should I resubmit them or they are still accesible from git-hub?

Blauelf

@Blauelf

Have you joined the course on the new submission platform? Your scores should have been migrated.

Old submissions would be at https://legacy.cs50.me, new ones on https://submit.cs50.io, all the scores from old and new scores would go to https://cs50.me/cs50x

@jg-karl

Oh, getting better, found something and looks that the link for certificate is also there...

Thanks

Yep, all working and found my way to certificate. Thanks! This chatroom works better than Slack!

Jack Howard

@JackHowa

looks like cs50 2018 is being shown for 2019x? not sure if I'm starting on the correct year https://video.cs50.net/2018/fall/lectures/0?t=16m19s

Blauelf

@Blauelf

CS50x 2019 (the course on edX) is based on CS50 fall 2018 (the course on campus)

CS50 fall 2019 is going to start soon, we will find those videos in January in CS50x 2020.

James Langridge

@james-langridge

For project 1 CS50W (book review app) are we supposed to store user passwords securely, or is the requirement just basically store the password string in the db without encryption?

Blauelf

@Blauelf

I'd store hashed and salted passwords only, like in CS50x finance problem. But I can't find it mentioned anywhere in the problem description.
Doug has written a book? :D

James Langridge

@james-langridge

:D thanks

dos_kid

@kid_dos_twitter

Guys can someone help me i'm stuck on project1 cs50w i dont know how to connect sql database to my site

James Langridge

@james-langridge

can anyone give any hints on how to serialise sql query results into JSON to provide API access for the book review app project CS50W? I get a TypeError: Object of type RowProxy is not JSON serializable.

James Langridge

@james-langridge

after playing around for hours, using some code I found online, I can return the following, but it's not formatted like in the requirements, and the data from my db is "null", the data pulled from goodreads works fine: [{"title": null, "author": null, "year": null, "isbn": "1632168146", "ratings_count": 28, "average_rating": "4.07"}]

Blauelf

@Blauelf

You have a RowProxy? Could you dict(your_variable.items()) and jsonify that (or rather a list of those)?

Data from db "null" sounds odd, not sure what you mean by that.

James Langridge

@james-langridge

.items() doesn't seem to work - I think because the RowProxy is a list

it is odd it's "null" :) I don't know either. I think it's only null when I save the sql results into variables, and then use those variables in a dictionary like: new_data = {"title": title, "author": author, "year": year, "isbn": isbn, "ratings_count": ratings_count, "average_rating": average_rating}.

something to do with SQLAlchemy and these RowProxys...

James Langridge

@james-langridge

getting closer with this: [{"title": "Memory", "author": "Doug Lloyd", "year": 2015}, {"isbn": "1632168146", "ratings_count": 28, "average_rating": "4.07"}]

thanks for your help

Shivam Yadav

@sudoshivam

How long does it take for the assignments to be graded?

Blauelf

@Blauelf

CS50x is graded automatically, should be near-instantaneous. The other ones (with "projects" instead of "problems") should take up to a few weeks. At least I read somewhere that usual time would be within 1-2 weeks. Not having advanced to another course (yet).

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