popcorn | A responsive & browser compatible video player | Video Utils library

Let's say I have this df:

I have the following pandas dataframe that has thousands of rows:

These are the grocery store lists:

I'm trying to split on 5x asterisk in Pandas by reading in data that looks like this

How can I split this string, that has LowerCase and UpperCase characters conjoined.

this is my string:

This is my flow: Content script -> Fetch data using background.js -> Return data and inject the new HTML into the webpage.

Now I have to show a tooltip using Popper.js but I get the error "document" is undefined. It's strange because I am in content-scripts.js. How can I get the newly updated dom after my injection?

content-scripts.js

To start off, regex is probably the least talented aspect within my programming belt, this is what I have so far:
\D{1,5}(PR)\D+$

\D{1,5} because common stock symbols are always a maximum of 5 letters
(PR) because that is part of the pattern that needs to be searched (more below in the background info)
\D+$ because I'm trying to match any single letter at the end of the string

A small tidbit of background
Preferred stock symbols are not standardized and so every platform, exchange, etc has their own way to display them. Having said that, most display a special character in their name, which makes those guys easy to detect. The characters are
[] {'.', '/', '-', ' ', '+'};
The trickier ones all have a similar pattern:
{symbol}PR{0}
{symbol}p{0}
{symbol}P{0}
Where 0 is just any single letter A-Z

Here is a sample data set for the trickier ones:

I am trying to write a buffer for an audio system with Oboe, the do and don'ts are

Callback do's and don'ts You should never perform an operation which could block inside onAudioReady. Examples of blocking operations include:

allocate memory using, for example, malloc() or new;

file operations such as opening, closing, reading or writing;

network operations such as streaming;

use mutexes or other synchronization primitives sleep

stop or close the stream

Call read() or write() on the stream which invoked it

Audio thread reads from my buffer and decoder thread writes to it and as you can imagine its all good until threading issues kicks in. My main problem is I can just use a mutex to overcome this issue but if i do so I will be blocking one of the threads and if audio thread is blocked then the sound basically not played resulting in "popcorn" sound. (A Sound that is so disturbing to listen to)

I play the sound through a callback where I feed the data to it.

I have below array data