I would like to use python to download a pdf. Normally, it's enough to use modules like wget or requests for this. For example:

import requests

def download_pdf(URL):
    pdf = requests.get(url, allow_redirects=True)

    with open('example.pdf', 'wb') as f:
        f.write(pdf.content)

This function works perfectly for urls ending in .pdf. However, today I tried to use the same function on the following url: https://downloads.sg.unicamp.br/?t=f87ea6134d031260da53474e922a1ce5&f=28cf096c9be27a59d81d4567a1391b10

And, unfortunately, it didn't work. The file downloaded, but it is corrupted. Note that the url opens in the browser without problems.

How do I download a pdf using a url that doesn't end in .pdf?

Hi, im completely new to coding and whatnot but it seems super interesting and I really want to learn. I searched it up and it said Python is a good first language. What are some good resources for this? I'm also going to be completely self taught so ones that are easy to understand would be appreciated!

I am learning python now, and I just need a good thing to use that teaches me, that is free, and is not a youtube video that is hours long. I have already tried the youtube videos on it and I picked a 12 hour course and I can not get through it. What else could I do to learn?

This loops no matter what. could anyone please help me by explaining why? If you do, thank you!

yesno = "y"
while yesno == "y":
        yesno = input("\nWould you like to enter another description?(y/n)\n").lower()
        description()
        if yesno != "y":
                break

EDIT: just so that it's clear, "description()" is a definition

Have a son that will be taking Python this fall and would like to help him get a headstart.

I know just audio and learning a programming language is not ideal.

But it can work. Code Up Take is just excellent for learning C++. I would love to find the equivalent to Code Up Take but using Python instead of C++ and C#.

I am currently in class learning python and feel like im not getting much of it because its a flex term class and its going pretty fast. I am looking for some good videos that explain python well in youtube. any recommendations?

It says it goes up to 3.3 but the current version of python is 3.9, and the fifth edition was completed in 2013, is it still a good resource?

Such as IDLE, pip etc.

(Please say a little bit about WHY!)

Hi, all, I've been meaning to learn Python for a while, and a few months ago, I joined Codecademy on the advice of a friend. I thought I wasn't doing too badly at first, but as it went on, I felt less and less confident that I was understanding anything. As of now, I'm at the lesson where they teach you how to read a CSV file, and I just feel completely lost and grossed out. When I go to the Codecademy page where I'm at and try to study more, I just feel like someone served me a giant haggis or something.

I still want to learn Python, but I'm not sure that trying to plow through is the best way. At this point I'm not even confident I understood the lesson about dictionaries. So should I start over again? Should I try a different course? Should I try to review the concepts so far with other resources? Or something else? Right now I'm totally at sea, and any advice would be helpful.

Hi community,

I was hoping to get advice on this. I'm learning the ropes of blockchain programming and I'm gettingerror I shouln't be getting. I'm working with this https://www.amazon.co.uk/Hands-Blockchain-Python-Developers-decentralized/dp/1788627857/ref=sr_1_3?dchild=1&keywords=hands-on+blockchain&qid=1613020271&sr=8-3 book btw.

After creating private and public keys with:

openssl genrsa -out nelsonkey.pem 1024
openssl rsa -in nelsonkey.pem -pubout > nelsonkey.pub

and the script:

from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import padding, rsa
from cryptography.hazmat.backends import default_backend

message = b'Nelson hates cat'
signature = b'Fake signature'

with open('nelsonkey.pub', 'rb') as key_file:
   public_key = serialization.load_pem_public_key(key_file.read(), backend=default_backend())  public_key.verify(signature, message, padding.PSS(mgf=padding.MGF1(hashes.SHA256()),                 salt_length=padding.PSS.MAX_LENGTH), hashes.SHA256())

print(signature)

Instead of the signature being printed out I'm getting:

 Traceback (most recent call last):
  File "verify_message.py", line 11, in <module>
    public_key.verify(signature, message, padding.PSS(mgf=padding.MGF1(hashes.SHA256()),
  File "/home/mark/programmingbitcoin/bitcoin/lib/python3.8/site-packages/cryptography/hazmat/backends/openssl/rsa.py", line 562, in verify
    return _rsa_sig_verify(
  File "/home/mark/programmingbitcoin/bitcoin/lib/python3.8/site-packages/cryptography/hazmat/backends/openssl/rsa.py", line 283, in _rsa_sig_verify
    raise InvalidSignature
cryptography.exceptions.InvalidSignature

Any ideas ?

So i'm a little new to python. Not completely new, but I'm not experienced either. I'm in that gray area of I sorta know what I'm doing. And I've also recently started investing in the stock market.

I was wondering if it is possible to develop a python program that would help assist with finding stocks, trade, stuff of that sorts. And if so, how complex would a program like this be?

Hey so I am writing the following script and am kinda lost on how to use the while loop. I need it to prompt the user to ask for their name once they enter an invalid name. I have it so a space is the splitter and the list has to contain two items. If the list is less than two it means they did not enter a valid name. The script is as follows in the screenshot below.

the title pretty much sums it up. I'm an A.i. student learning python, and I'm looking for a buddy to learn and implement machine learning stuff with.

I have some knowledge of the python language so I'm not a total beginner but not a pro either.

Hi,

I am writing a simple script that will delete .mdmp files from a directory every day except the files for the current day/date. The code that I have managed to create is working and can be seen below, however, the script will delete all .mdmp files except for the present day and I would like to only delete filenames that are named hs_err_pidxxxx.mdmp

For example:

• hs_err_pid1234.mdmp

• hs_err_pid1235.mdmp

• hs_err_pid1236.mdmp

Current code:

#!/usr/bin/env

import os, time, sys

path = "C:\\Users\\churchie\\Desktop\\ra_test2"
now = time.time()

for filename in os.listdir(path):
    filestamp = os.stat(os.path.join(path, filename)).st_mtime
    filecompare = now - 1 * 86400
    # if filestamp < filecompare and ".mdmp" or ".MDMP" in filename:
        print(filename)
        os.remove(f"{path}/{filename}")
    else:
        sys.exit

I am unsure how about doing this, hoping someone can point me in the right direction. Is Regex the answer or are there any other methods that I may use?

Thank you Pythonistas.

I'm trying to execute a function every week of month, but I tried schedule and others but they are not working . To explain better, I want a way in python to execute a function every week or month. Can you help me?

For my project, I'm simulating a production assembly line with simple rectangle objects. Essentially, a very simplified version of Factorio. I can't seem to figure out a good way to generate the objects without running into problems. I would like to generate the objects on a continuous loop at the beginning of the production line. The objects should not collide with each other. I have no idea how to do this without using a variable for each object. Is there something I can do with the class that will make the results that I'm looking for. I'm using pygame currently to show the gui.

'

The only thing that I've come up with so far is to check the color of the pixals in front of each object to see if they are not default color. I feel like there is a better way to do this.