bitcoincash | Bitcoin Cash - Peer-to-Peer Electronic Cash | Cryptocurrency library

I am working on an application that stores metadata in the Bitcoin Cash blockchain via Bitcoin scripts. Specifically, the scripts consist of a standard multisig script followed by a data push and a data pop. For example, the following script is a 1-of-1 multisig script followed by pushing the hex encoding of { a: 'a' } and popping it off again.

I am exploring bitcoin source code for some time and have successfully created a local bitcoin network with new genesis block.
Now i am trying to understand the process of hard forks (if i am using wrong terms here, i am referring to the one where the blockchain is split instead of mining a new genesis).
I am trying find this approach in BitcoinCash source code, but haven't got anywhere so far except the checkpoints.

I have a laravel validation that needs to match one of the 3 regex's

I have a problem with merging together serval dataframes. I downloaded some historical trading data and saved it into a csv file. So now I want to read the data from the cvs file into several dataframes and extract some close prices.

I created a function, called read_dataset that reads the data into a dataframe and returns that dataframe.

In combination with a for loop I stored all Dataframes in a dict. Dict keys are the abbreviations of the currency (see coin_list dataframe).

I would like to save this kind of arrays with Core Data:

My UITableView with custom reusable cells is done but two issues remain:

1. I can create 6 cells but when I add the 7th the app crashes with Unexpectedly found nil while unwrapping an Optional value which I really can not understand. The view crashes again instantly when I relaunch the app.

2. The cells' data is reused correctly except for the valueLabel.text's. When I update this value on a cell with the tableView scrolled, the data falls back one row (as illustrated). I believe this is an indexPath problem related to incorrect editing (updating?) of the data source but when I relaunch the app the data is in the correct cell.

I marked these events 1 and 2 in the code below.

Creating the data:

I am facing the problem of having a list in my data.frame:

I am attempting to set up a website on cookeicutter, I created a new app called "bots" and added a class called Trade within models that lists 2 parameters, "titles" and "units". After migrating and running the server, when I open the admin panel and click on the "+ add" button within the panel to create a trade (see picture). The Django Webpage returns this error: