Do you ever wonder how your Python code looks to the interpreter? What those `.pyc` files are? Why one program outperforms another, even if the code is similar? Then let’s dive into Python bytecode! Bytecode is the "intermediate language" that expresses your source code as machine instructions the interpreter can understand. In this talk we’ll see what role it plays in executing Python programs, learn to read it with the `dis` module, and analyze it to better understand a program’s performance.