Re: Is Lexical Binding The Norm Yet?

ram@zedat.fu-berlin.de (Stefan Ram) writes:

Alan Bawden <alan@csail.mit.edu> writes:

Why didn't that work?

Implicit invocations of special methods are only guaranteed
to work correctly if defined on an object's type, not in
the object's instance dictionary. (See: The Python Language
Reference, Release 3.13.0a0; 3.3.12 Special method lookup).

  That was a rhetorical question!

  To use "prototypes", you need to write a custom clone method anyway
  (I just posted one to "comp.lang.python"). So, while you're at it,
  you can then as well define your custom global "len" function:

def len( x ): return x.__len__()

  . (It might still be some work to get the rest of the
  standard library to use this definition, but now we are
  talking about a library and not about a language. Yes,
  the Python standard library assumes class-based objects.)