niso | An improved Golang OAuth2

I am beginner to JS and receiving error on this code. I could not make it work and getting this error: calc is not defined at HTMLButtonElement.onclick

Do you have any suggestions what may be wrong in my code?

I've searched online, but could not find the reason to my question. Watched different videos as well.

I have problem because I can not find the reason why my function in Django views.py sometimes runs two times. When I go to url, which call function create_db in Django view, function read json files from directory, parse it and write the data in the database. Most of the time it works perfectly, but sometimes for no reason it runs two times and write the same data in the data base. Does anyone know what can be the reason why code is sometimes done twice and how can I solve the problem?

Here is my create_db function:

I am building django app where user select a company and then application pass company primary key over url. User is than redirect to the page where he can see all company devices and he can add new one to the list. Now I have problem. When I submit the form with all the data, I allways get the same validation error, which tells me that company field is requierd (I added foregin key to the form before validation). What I am doing wrong?

views.py:

Following is the XML format:

On a newly built AEM 6.3 Author server (Service Pack 2), the RTE component automatically prepends our Author URL to any asset selected through the Asset Selector.

The domain is prepended only after selecting the asset and clicking OK. Before clicking okay, the relative path is the only thing there.

But immediately after selecting the asset, it's possible to confirm from the JCR that the path contains the Author domain.

And if you open back up the asset selector, the prepended path is visible there, too.

I'm not sure it's the root of the issue, but the first time I see an absolute link show up during processing is when the Link.js file (/libs/clientlibs/granite/richtext/core/js/commands/Link.js) creates a the HTML node for the tag. Even though url is relative, childNodes[0].href is absolute:

I have written a code, which uses sympy to set up a matrix and a vector. The elements of these two are sympy symbols. Then I invert the matrix and multiply the inverted matrix and the vector. This should be a generic solver for linear equation systems with n variables. I am interested in the symbolic solution of these linear equations. The problem is that my code is too slow. For instance, for n=4 it takes roughly 30 sec but for n=7 I haven't been able to solve it so far, the code ran all night (8h) and hasn't finished in the morning. This is my code.

I would like to do some symbolic mathe withe some matrices. But my code does not work. Setting up my first matrices is no problem but calculating the wanted one from the start matrices does not work and I do not know why. Any suggestions?

I have some xml files in the format

I have some xml file that look like