I know that if I have a global variable (let’s say a double called N) I can read it using: but what if my variable is a pointer? How can I read the contents of the pointer in to a python list? To be clearer, N is declared in the following way in the shared library: Answer Given this (Windows)
Bit Manipulation, find another shortest array whose binarian is same as the given array’s binarian
Given an array A, its binarian(A) is defined as 2^A[0] + 2^A[1] + …. 2^A[n]; Questions asks to find anther shortest array B whose binarian(B) is same as A’s. For example, A=[1,0,2,0,0,2]，thus if B=[3,2,0], this satisfies the requirements, and the output is 3. Could you guys provide some ideas of h…
Getting min and max datime for each date in csv
I’m kind of new to data science and Python. First of all, do you suggest using any other Library than pandas when dealing with huge dataset (100K+ rows)? Second of all, let me expose to you my current problem. I have a Dataset in which I have a Datetime column, to make it easy to understand, let’s…
Can’t figure out why graph is not updating
I’m setting up a plotly-dash website where I want to show data from some domains from different points in time. Therefore I have a slider with which you can decide which data from which point in time you want to see. That already works. Moreover I want that if somebody clicks on one point it shows a lin…
Problem with Django: No module named ‘myapp’
Good afternoon, I’m new to Django and I’m trying to follow a tutorial. However, when running the server, the following error pops up: This is a screenshot about how my files are right now: Answer Your myapp folder should be inside in your mysite folder
Find all coordinates of black / grey pixels in image using python
I’m trying to find a way to read any any .png, .jpg or .tiff, and return the coordinates of all black or grey pixels in that image. I’m thinking of having a certain threshold grey color, and writing out the coordinates of every pixel that is darker than that. I’m not sure how to manage the a…
Creating Python submodule
I want to create a tool called unifile for saving and opening files like this unifile.open.yaml(“file.yaml”). This is my structure: Code that call my module: open/init.py 1 error if I import unifile always say: module unifile has no atribute open 2 error in __init__.py I can’t open file [pyl…
How to create a Python convolution kernel?
I’m trying to create a convolution kernel, and the middle is going to be 1.5. Unfortunately I keep running in to ideas on how to do that. I’m trying to create something similar to this Answer Since OpenCV uses Numpy to display images, you can simply create a convolution kernel using Numpy. Here…
Custom Column Selection in Pandas DataFrame.Groupby.Agg’s dictionary
I have a problem in selecting what columns to be inserted in Pandas.DataFrame.Groupby.agg. Here’s the code to get and prepare the data. Which results in What I’ve done so far is that results in: The question is: How do I include other non numeric columns? How do I include other undetermined column…
namedtuple._source not working in python 3.7
I’ve tried with this code But when I run it it says that there is no attribute _source (for t and therefore also for i). Has it been eliminated since 3.6? Answer Yes, as stated here, the attribute _source has been removed from namedtuples in Python 3.7. Changed in version 3.7: Remove the verbose paramet…