pendulum | simple markdown editor for static files | Static Site Generator library

I wrote a DAG with a SubDag inside it:

I need to perform a ZOH discretization of a continuous LTI state-space model in OpenModelica (OMEdit). I tried two ways of doing this:

1. using matrix exponential (Matrices.exp function) for calculating discretized A matrix (A_d) and subsequent calculation of discretized B matrix (B_d) following equation: B_d = A^-1 (A_d - I) B, where I is identity matrix; This algebraic equation can be solved either by direct calculation of matrix inversion (Matrices.inv function) or, more efficiently, by solving for B_d matrix using Matrices.solve2 function: Bd = Matrices.solve2(A,(Ad-identity(2))), thus avoiding calculation of matrix inversion. However, in both cases A matrix must be invertible, what generally (and very often) doesn't hold.
2. using Matrices.integralExp function which should return both discretized matrices (A_d, B_d) and should work for general matrix A, whether invertible or singular; However, this function does not work for me - it returns error message: "No viable alternative near token: (".

I attach code for both methods for demonstration purpose. The state space model represents a very simple second-order system of linearized pendulum with length 1 m, mass 1 kg and gravitational acceleration 9.81 m/s². Sampling time for discretization is 0.1 s. The first code works fine (A is invertible in this particular case) but the second code doesn't. Does anybody know what am I doing wrong? I'd be grateful for any advice.

method #1:

My biggest issue is that I have several email accounts attached to my profile in Outlook. They all belong to the same domain as my main one. I'm able to send and receive as the other accounts. However, with the below code, I'm not able to access the Inbox folders of the other accounts. Just my default one i.e. mapi.GetDefaultFolder(6). How can I access inboxes of the other accounts and download the attachments as that's what I need? I tried mapi.Folders('hhh@yyy.com').Folders('Inbox').Items and that didn't work. Any idea of how to work this out?

I installed Airflow with postgreSQL for the first time. However, after activating DAG on the web, about 16 DAGs are created at the same time as shown in the picture below. enter image description here

As a test, I made a dag that enters the current date into the db for 10 seconds once a second. If intended, it should be generated one row per second, but the problem above creates multiple rows per second. enter image description here

Below is the DAG code.

Airflow scheduler kinda left me scratching my head for the past few days as it backfills dag runs even after catchup=False. My timezone-aware dag has a start date of 13-04-2021 19:30 PST or 14-04-2021 2:30 UTC and has the following configuration:

I have Airflow deployed in virtual env and in case I try to execute PythonVirtualenvOperator with import of the Airflow module (to get Variables for example) it gives me the AttributeError. Guess I do not fully understand how Airflow executes VirtualenvOperator, and therefore what to do to overcome it, so any suggestions and insights will be highly appreciated

My test DAG code

I have created a script using PYGAME to animate a pendulum motion simulation. I want to press a "q" key to stop the simulation and close the window. I tryed many different codes but all return some error. The lest version of the event part of the code was:

I need to create a widget that is used to pick a time. QTimeEdit widget doesn't seem intuitive or a good design. So I decided to create a time picker similar to the time picker in smartphones.

I managed to create the clock and click that makes the pointer (something similar to the pointer in the image) move to the currently clicked position (note: it's not perfect, it still looks bad). I would like to have help with making the inner clock

Here is my code:

I am trying to create a Python package using poetry. I haven't been able to replicate the steps described in documentation. When I try to add a dependancy, e.g.