Synchronous file handling makes for simpler code ... The fs.writeFileSync() method makes it very simple: it just takes the filename and its contents. I’m glossing over other fs capabilities ...

And let's not even mention field quoting. If you deal with CSV files and you use Python the csv module can make your life a bit easier. Dealing with CSV files in Python probably couldn't be much ...

The newly approved Python Enhancement Proposal 751 gives Python a standard lock file format for specifying the dependencies of projects. Here’s the what, why, and when. Python Enhancement ...

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.