Here’s a simple example: In this example ... The ‘type’ metaclass The built-in metaclass in Python is type. Surprisingly, type is not only a metaclass but also a class and a function!

For example, I could set a breakpoint ... Well, it turns out that Python offers a way to create an anonymous function using this lambda thing. In line 34, lambda a: not a.known() means we have a ...

Usually, inner scopes — for example functions within functions — would be able to see and change outer scopes. In Python, inner scopes can only see outer scopes, but not change them.

The example from Dropbox (linked above ... If you want speed, use C, not Python. But for Pythonistas, writing C code brings a host of distractions—learning C’s syntax, wrangling the C ...