In the early days of C, you’d occasionally see someone — probably a former Pascal programmer — write something like this: #define BEGIN { #define END ... for loop inside of Python.

Loops are a commonly used structure in programming that allows you to repeat a block of code a set number of times, or until you meet a particular condition. This is useful for many reasons.

In the following example, we loop through a list of numbers, and use the variable digit to hold each number in turn: Strings in Python are considered “sequences” — they can be iterated over ...

There’s still no end-user interface to subinterpreters ... the GC runs only on the “eval breaker” mechanism in the Python bytecode loop—that is, between executing one bytecode and another.

Python works well on both of these platforms because of its flexibility, facilitated by its extensive list of built-in functions. By using the open() function and a simple loop, you can cycle ...