It’s simple enough, we just need to open the file in append mode. Opening an existing ... files to disk in just a few lines. The following Python program extracts all zip files given as ...

The “w+” tells Python that we are writing to a new ... But what if you want to append (add) to a file that already exists? In this case, you simply swap the “w+” for an “a+”.

I'd now like to write the result of each simulation to a CSV file. 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 ...