It doesn’t use an anonymous function, no. Basically the compiler converts the code into something broadly equivalent to the while loop you’ve shown here. foreach isn’t a function call – it’s built-into the language itself, just like for loops and while loops. There’s no need for it to return anything or “take” a function of … Read more
The behaviour is guaranteed. I’ve contributed a patch, which was accepted and merged recently, so if you grab the latest sources you will see that the short-circuiting behaviour is now explicitly enforced. git clone https://github.com/python/cpython.git grep Short-circuit cpython/Lib/test/test_builtin.py
var d = 1.0d; // double var d0 = 1.0; // double var d1 = 1e+3; // double var d2 = 1e-3; // double var f = 1.0f; // float var m = 1.0m; // decimal var i = 1; // int var ui = 1U; // uint var ul = 1UL; // ulong var … Read more
You may find this useful – Python internals: adding a new statement to Python, quoted here: This article is an attempt to better understand how the front-end of Python works. Just reading documentation and source code may be a bit boring, so I’m taking a hands-on approach here: I’m going to add an until statement … Read more
In Python 2.x this is not guaranteed as it is possible for True and False to be reassigned. However, even if this happens, boolean True and boolean False are still properly returned for comparisons. In Python 3.x True and False are keywords and will always be equal to 1 and 0. Under normal circumstances in … Read more