Sockets and multiprocessing
If you want to write a forking server, one obvious way to do it is to use the multiprocessing module to create a pool of processes, then hand off requests as you get them.
The problem is that handling a request usually involves reading from and writing to a client socket.
Micro-optimization and Python
I was recently trying to optimize some C code using cachegrind, and discovered that branch misprediction in an inner loop was the culprit. I began wondering how much anything similar could affect Python code.
3Why does my 100MB file take 1GB of memory?
A lot of people have questions like this:
I've got a 100MB CSV file. I read it in to a list, populated with a csv.DictReader, and my computer starts swapping. Why? Let's look at what it takes to store a 100MB file as a list of dicts of strings.
How to edit a file in-place
There are hundreds of questions on StackOverflow from people who want to know something like, "How do I edit a file in-place, without creating a new file."
In general, the answer is, "You can't.
