Python

Adding functions y(x) together in python – impossible?

I’m currently trying to solve an engineering problem where I need to solve relatively long differential equations, for which I’m using the method odeint from scipy. I changed my problem to more easy variables and equations to shorten the code below and make it clearer. I want to add two parts of a…

Pygame how to change background colour without erasing anything else

background pygame python

I’m making this drawing thing in Python with Pygame. I have functions that draw circles and rectangles, but I want to add a function that lets me change the background colour, while not erasing the other circles and rectangles. Here is the code for the rectangles: A function for it would be best, but an…

Is the Python assert message evaluated if the assertion passes

assert assertion python

Let’s say I have an assert statement with a computationally heavy error message (e.g. makes several network or database calls). I could also write this code using an if statement: I know the latter option will only evaluate the error message if x != 5. What about the former option? I would assume so but…

python Django REST Framework CSRF Failed: CSRF cookie not set?

django python python-3.x rest

I have a web-application that I need to do some API level testing. I was able to make a Django Post request API call in curl command as this: But, if I was trying to port the similar code into python3 as follows: I have got such failure in return, Does anyone know what could be wrong ? Answer You

How do I fit tensorflow ImageDataGenerator

python tensorflow

I’ve build my model, but do not know how to fit it. Could anyone give me some tip so I can use ImageDataGenerator in my models while working with images, or it is better to use other ways like using Dataset? My directory architecture: PS: I found article where same method used and everything seems to wo…

plotting a 3d graph of a regressor made with sklearn

3d matplotlib python scikit-learn

I have been using this tutorial to learn decision tree learning, and am now trying to understand how it works with higher dimensional datasets. Currently my regressor predicts a Z value for an (x,y) pair that you pass to it. I want to use a 3d graph to visualise it, but I have struggled with the way regressor…

Call Python function using dynamic string variables

function python python-3.x string

I am trying to create a dynamic method executor, where I have a list that will always contain two elements. The first element is the name of the file, the second element is the name of the method to execute. How can I achieve this? My below code unfortunately doesn’t work, but it will give you an good i…

Represent a video as a 2D Array where each column represents a frame – OpenCV and Python

opencv python

My goal is to transform a video into a 2D matrix X, where the column vectors represent a frame. So the matrix has the dimension: X.shape —> (# features of a frame, # total number of frames) I need this form because I want to apply different ML algorithms on X. To get X I proceed as follows: upload th…