The “w+” tells Python that we are writing to a new file. If the file already exists, ... In short, each line represents a row in a database and contains a series of values separated by commas.

The problem I've noticed is that if I append the file with each of the 100k runs (one at a time), it can happen that two threads try to save to the file at the same time and some row(s) end up empty.

Python is one of the most approachable languages to learn, thanks to its object-oriented-first approach and its minimal syntax. The standard library includes many useful modules that you can use to ...