I got 3 NumPy data arrays r,g,b represented as a 2D float64 array (720×1024) Essentially per row, each channel is a bunch of floats: What I would like to to do is making it a channel that I can use in cv2.merge((r,g,b)) So that the float64 values per row get multiplied by 255 and something that cv2.merge…
Conditional lambda in pandas returns ValueError
In a df comprised of the columns asset_id, event_start_date, event_end_date, I wish to add a forth column datediff that for each asset_id will capture how many days passed between a end_date and the following start_date for the same asset_id, but in case that following start_date is earlier than the current e…
Encountering ‘dict object’ has no attribute ‘results’ with Ansible despite previous checks indicating it does exist
I am using Ansible and I am encountering an issue that I do not understand or know how to solve. Hopefully someone can help me. The problem occurs with a failed_when conditional: My task is: In attempting to debug, I have written the following: where, I think, the important information here is: I am new to An…
Clojure to Python: optional element in str like fn
Clojure version: Naive Python version: Question: How to make the python version shorter and more idiomatic? Answer In case with None as default argument:
How to turn a Pandas DataFrame into a table of vectors
I have a two columns Pandas data frame containing a list of user_ids and some URLs they have visited. It looks like this: I want to create a vector representation of itself, like this: I’ve tried different things, but keep hitting a wall. Any ideas? Answer What you’re describing is a pivot of the …
The iteration loop is not working properly for API
There is an API that only produces one hundred results per page. I am trying to make a while loop so that it goes through all pages and takes results from all pages, but it does not work properly. This script goes through the pages: At startup: He sees five pages. When I look at the variable after execution: …
Python: How to pass variables into decorators AND decorators pass decorator variables back into function as well?
I am always looping through the files of a directory to perform various kinds of data manipulations. Thus, I always use the following code Instead of keep writing these lines of code for every function, I was wondering if I can make it better by using decorators. Like the following: I have found many resource…
wondering what happened to my python code that draw a checkerboard with turtle? any helps?
Current image: Intended image: My code won’t draw a correct checkerboard pattern, but I wonder why every for loop my square black and white both executed at the same time? I am not asking for the correct code that will get me the correct checkerboard and I just want an explanation for the mistakes in my…
Python Asyncio – Pythonic way of waiting until condition satisfied
I need to wait until a certain condition/equation becomes True in a asynchronous function in python. Basically it is a flag variable which would be flagged by a coroutine running in asyncio.create_task(). I want to await until it is flagged in the main loop of asyncio. Here’s my current code: Is there a…
@lru_cache decorator excessive cache misses
How can you configure lru_cache to key its cache based on actual values received, rather than how the function was called? In other words, only the first call above should be a cache miss, the other two should be cache hits. Answer To do that, you would have to go through the process of binding arguments to f…