The documentation does a great job explaining how things normally get looked up, and how you can hook them.
But to understand how the hooking works, you need to go under the covers to see how that normal lookup actually happens.
When I say "Python" below, I'm mostly talking about CPython 3.5.
But to understand how the hooking works, you need to go under the covers to see how that normal lookup actually happens.
When I say "Python" below, I'm mostly talking about CPython 3.5.
In Python (I'm mostly talking about CPython here, but other implementations do similar things), when you write the following:
def spam(x): return x+1 spam(3) What happens?
Really, it's not that complicated, but there's no documentation anywhere that puts it all together.
def spam(x): return x+1 spam(3) What happens?
Really, it's not that complicated, but there's no documentation anywhere that puts it all together.
I've seen a number of people ask why, if you can have arbitrary-sized integers that do everything exactly, you can't do the same thing with floats, avoiding all the rounding problems that they keep running into.
In a recent thread on python-ideas, Stephan Sahm suggested, in effect, changing the method resolution order (MRO) from C3-linearization to a simple depth-first search a la old-school Python or C++.
Note: This post doesn't talk about Python that much, except as a point of comparison for JavaScript.
Most object-oriented languages out there, including Python, are class-based. But JavaScript is instead prototype-based.
Most object-oriented languages out there, including Python, are class-based. But JavaScript is instead prototype-based.
About a year and a half ago, I wrote a blog post on the idea of adding pattern matching to Python.
I finally got around to playing with Scala semi-seriously, and I realized that they pretty much solved the same problem, in a pretty similar way to my straw man proposal, and it works great.
I finally got around to playing with Scala semi-seriously, and I realized that they pretty much solved the same problem, in a pretty similar way to my straw man proposal, and it works great.
