Threads in Python are used for running multiple operations concurrently within the same process space. They are particularly useful when your program needs to perform I/O-bound tasks, such as ...

Creating threads. Threads allow you to create tasks that are executed simultaneously (alternately) within one process. Threads are also called the "light" version of processes. The _thread module is ...

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.