I have almost no webscraping experience, and wasn’t able to solve this using BeautifulSoup, so I’m trying selenium (installed it today). I’m trying to scrape sold items on eBay. I’m trying to scrape: https://www.ebay.com/sch/i.html?_from=R40&_nkw=oakley+sunglasses&_sacat=0&…
Unable to connect to AWS ElastiCache form python client
I have an AWS ElastiCache instance of 2 replicated nodes (cluster-mode disabled). I am able to connect through my java client using redisson (a service running in the same cluster). However, when I’m using the python redis client, it does not seem to connect. Or it seems to connect but doesn’t sub…
Combine list elements to create a nested list
Given a python list with alternating values of two types: How can I combine every two values to get something like this: Answer You can simply use range()’s step parameter and list indexing. Output:
Failed to struct.pack connection name in python
I try to use struct.pack but i get the next exception when i run it: the code that i run: I try to send the connection_struct as str and also as a bytes using encode. Answer The {name_len}s in your connection_struct specifies that you will pass {name_len} number of chars so when you call struct.pack() the las…
CSV data preprocess
I have a .csv file like this format Then I want to convert it to How can I do it with python pandas Thank you Answer If you load it then you will have DataFrame like Set multi-index usinig year and month Reshape it using stack() You can add name to column with day Reset index to get normal columns
Divisibility Problem Rejected due to RunTime Error – NZEC
I am trying to solve this problem on HackerEarth which ran flawlessly on my Jupyter NoteBook but for some reason, I’m getting a Run-Time error of NZEC on HackerEarth. The question is as follows – You are provided with an array A of size N that contains non-negative integers. Your task is to determ…
Python – Selecting data from at one specific time per day
I’m quite new to Python and have a simple question (I think). I have an array with hourly data for an entire month. I want to make a new array with only data at a specific time every day (at 00:00 UTC). How do I do this? This is what the array looks like: Thank you for your help! Answer
List has an issue
My code is: I want the output to be a list from my inputs. Why is the output [True, True, True] when there are three inputs before typing ‘quit’? Answer Looking at Operator precedence, the assignment operator := is the lowest of them all. That means that python evaluated the != first and assigned …
Why PyCryptoDome’s 3DES algorithm uses 128-bits or 192-bits key instead of 56-bits?
According to Wikipedia, 3DES’s cipher uses a 56-bits encryption key to encrypt data; but Pycryptodome’s 3DES class uses either 128-bits or 192-bits encryption key. Also both Pycryptodome’s AES’s and 3DES’s encryption speed are same, output is similar. Am I doing something wrong o…
Why is my class factory not populating my dynamic object’s `__dict__` attribute
I have a class factory which dynamically builds new types (not objects/instances). The code is currently working per-se, but I can’t figure out where the attributes I give it are stored. Below is an image of my driver code and output: All attributes and methods are set and working as expected, but they&…