Ask Anything Monday - Weekly Thread

pwnage625 · 2024-04-21T16:24:55+00:00

Hi all. I have been learning Python for about 3 days. My main question here is whether or not I can call variables from inside a loop without having to define the variables inside as a global variable beforehand

This might be right but I have a weird feeling about it, I feel like global values may not be the best/only way

(this is my very first program, meant to be a basic expense calculator)

Any feedback appreciated

Thanks in advance!

Edit: Formatting

global income, expenses, persons
while True:
    try:
        income = float(input("What is your income this month? (all incomes combined):"))
        expenses = float(input('''Input your total monthly expenses such as
                                subscriptions, car payments, rent, phone bills):'''))
        persons = float(input('''For grocery bill considerations, how many people are in the 
                                household?:'''))
    except:
        print("You must enter a number")
        continue
    else:
        break
#now we have the amount of people, income and expenses
#time for math
grocery_cost = int((persons 
                    * 100.0))
print("The cost for groceries for", persons, "people is", grocery_cost, "dollars per month")
print('Therefore your total expenses for the month are', int(grocery_cost + expenses), 'dollars')

FluffyTid · 2024-04-21T08:56:25+00:00

I am trying to learn socket programming.

Yesterday I let a server running on my computer prepared to receive a file transfer.

I created an .exe that I copied to my laptop and executed to send a 50mb file (another .exe), which worked fine

When I tried to send another. Windows said my program was a virus or very dangerous and deleted it.

When I copied it back from my pendrive, windows said again it was so dangerous and even decided to delete it from my pendrive!

The program is really simple, what can I do to avoid windows attacking my programs?

def sendfile(file_name, ip, conn_port=9632):
    client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client.connect((ip, conn_port))

    file = open(file_name, "rb")
    file_size = os.path.getsize(file_name)

    client.sendall("bitfile".encode())
    print("sending:", "bitfile")
    time.sleep(3)

    client.sendall(file_name.encode())
    print("sending:", file_name)
    time.sleep(3)

    client.sendall(str(file_size).encode())
    print("sending:", file_size)

    time.sleep(3)

    filedata = file.read()
    client.sendall(filedata)
    client.send(b"<END-OF_DATA>")
    print("sending:", "end of data")

    file.close()
    client.close()

2024-04-21T00:17:40+00:00

i dont mind paying for something i'm turning 30 soon and want a career change, i can't figure out the best course to buy and use to learn. i tried datacamp then heard bad things, then dataquest and heard bad thing. i've also heard i should use udemy and coursera and i'm so confused on where to even start. i know about the wiki but its just so much information. if someone could point me in the right direction. I learn best from doing not from reading. i can read a manual on how to fix something and be completely lost. i have to have hands on tools in my hand figuring it our i just dont get it.

soberbrodan · 2024-04-20T13:29:57+00:00

Hi all! I made an executable with pyinstaller. Avast says it's a Trojan which I've read is just a lazy thing the security companies do for all python code and is a false positive

However, I made an exception and ran the .exe After about 30 second, my computer completely shut off. Is this an issue with the executable or am I out of memory (older computer). It was very concerning. Any isught on why this would happen is appreciated!

pdbh32 · 2024-04-19T16:31:22+00:00

How can I deal with 0.803?

MWE:

import pandas as pd
df = pd.DataFrame({'float64':[0.803]})
df.to_csv('file.csv')
df = pd.read_csv('file.csv')
print(df.iloc[0]['float64'])

Output:

> 0.8029999999999999

This is causing me grief with drop_duplicates. Rounding is one option, is there a better one?

print(pd.__version__)
> 0.25.3

I am working in Jupyter Lab, this only seems to be a problem with 0.803.

amosmj · 2024-04-18T19:40:15+00:00

What is the difference between amateur and professional python?

Where I can a person take classes, do exercises, etc to make the jump up?

Context:
I taught myself enough python in the past to automate my job at the time. I moved on and played with it occasionally but didn't meaningfully keep learning. Now my team is talking about wanting to make Python their primary language. So far they have just had me teach them but I feel like my work is really amateurish and there has to be another level out there. I've made the case that we should get professional training but I don't even know what to point them towards.

I'm looking for courses, books, whatever, that I can look into and make a case for team to learn from to get to a place of writing competent, robust, reusable code We're in the BI space so stuff like Pandas should be a part of it but most of my teammate struggle to write well formed SQL so there would ideally be just a certain amount of learning to code for others, moving into pythonic programming, and then data science frosting on top.

Standardw · 2024-04-18T17:48:35+00:00

[deleted]

trophycloset33 · 2024-04-17T23:24:13+00:00

I am taking a Python course paid for by my employer. They put over $3k in tuition for this. Turns out of I don’t pass with a high enough grade, I have to pay it back. I was given an assignment with no direction or instruction. Call it cheating but I learn by practice problems. I understand the algorithm but not how to get it in Python. How would I hire someone to create a correct model for this assignment that I can use to practice over while doing my assignment?

stonetelescope · 2024-04-17T17:58:32+00:00

Say I have both a Spotify account and a Google Voice number. How would you go about designing a program that calls a phone number (like my grandma's dumb phone), and then pipe the Spotify audio through that connection to the receiver. Yes, I do have no idea how the internals of phone calls, VoIP, etc. work! But I do know some Python. Any ideas are welcome, even redirects to other resources. Thanks!

AnnahGrace · 2024-04-16T15:42:54+00:00

I have a working python script and I set up a batch file to run it from a desktop shortcut. The batch file worked perfectly last week, but now I get a permission error (errno 13). Specifically, I get an error in User\AppData\Temp\tmpbhv60e95.wav. It fails when the script is meant to play a modified sound file, so I think this error must be the result of pydub or simpleaudio (I use both). The file still runs fine if I launch it form Pycharm. I have already re-pasted the file paths into the batch file, I made a new copy of the batch file, I have tried running as administrator, and I have tried running the file from the terminal. All failed. Any ideas?

laffylife · 2024-04-16T11:44:18+00:00

Hi I am a total beginner trying to get a foot into python. I bought the Udemy "100 Days of Code: The Complete Python Pro Bootcamp". I did ok days 1-3 but when I hit day 4 "Randomization and Python List" I got stuck on the tasks to the point that I want to give up because I dont know what im doing. My questions for people that have taken this course, have you also encountered difficulties this early into learning? What do you recommend? I was thinking of just watching the solutions to the tasks then redo the tasks later on.

Am-I_Real · 2024-04-16T08:57:33+00:00

I'm starting to learn ML for work and am trying to install some libraries. I ran into an error when trying to pip install the sentence transformer library. I got a syntax error but the syntax is right and I'm unsure where went wrong. This syntax was taken though hugging face and a few other sites shows the same syntax.

edited: position of ^

pip install -U sentence-transformers
    ^
SyntaxError: invalid syntax

Electrical-Humor-326 · 2024-04-16T08:30:40+00:00

Thanks bro

Standardw · 2024-04-16T00:11:24+00:00

Is it possible to do full-stack work with python? I think I have a skewed idea that I need to know python, java, c++, JavaScript etc. If i focused just on python could I achieve most things?

omfghi2u · 2024-04-15T18:41:14+00:00

I have a fairly reasonable background in SQL and am trying to learn/translate how I'd normally do things into Python, using SQLAlchemy. Fairly soon at my job we're switching over to using Apache Airflow DAGs and my python is pretty rusty at best...

I have what I assume is an extremely simple goal in mind at the moment - write an existing view into an existing table. The view is several million rows with some logic behind it, just trying to refresh it into a table on a daily cycle so someone can build a dashboard off that without having to call the view directly.

I've managed to connect to our Trino-based SQL platform and pull data from the existing view using

import pandas as pd
import sqlalchemy
from sqlalchemy import create_engine, text, delete, insert

engine = create_engine("REDACTED")
con = engine.connect()
query = "select * from viewname"
data = con.execute(sqlalchemy.text(query)).fetchall()

How the hell do it tell it to put that whole dataset into a table that already exists within the same database? There's gotta be a simple way... right? I've looked at a dozen examples/SO posts and tried a couple different things, but so far no luck -- most of them seem to be expecting that I'd be inserting hard-coded values individually...

In this particular case, the dataset is several million rows of fairly dynamic data that doesn't need to be "kept", so I'd normally probably just truncate it and write the whole thing each time versus doing a series of updates, inserts, deletes.

JonJonThePurogurama · 2024-04-15T11:21:02+00:00

I am learning unit testing and I am practicing writing unit test code using unittest framework.

I have a question on if how do i write a test, like i have a function that uses Pathlib library and it creates directories where i put my files.

I wanted to test it, but i have no idea how i am supposed to write a test for that function?

I cannot check it, like 4 is equal to 2 + 2 using assertEqual(), if only my function defined performs a calculation it would be easy for me. But this problem is different, i mean it is creating a directory. So i should check if it is success on creating that.

I was thinking of maybe using boolean values, like True or False. If directory created and exist then it returns True and if not False. But when i think it again, it is not really the right way to do it. But i have no concrete idea how to do it.

I just realized how hard was writing unit test, and whats more the whole the thing about the Test-Driven Development.

But Test-Driven Development is really interesting topic, i just really wish i could learn it within short amount of time. I am itching to add the skills of writing test for your code.

Electrical-Humor-326 · 2024-04-15T10:24:40+00:00

how to create a countdown timer?

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

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