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14.11.17 22:34, Ivan Levkivskyi пише:

This function will be called only if \`\`name\`\` is not found in the module
through the normal attribute lookup.

It is worth to mention that using name as a module global will bypass \_\_getattr\_\_. And this is intentional, otherwise calling \_\_getattr\_\_ for builtins will harm a performance.

Backwards compatibility and impact on performance
\=================================================

What is affect on pydoc, word completion, inspect, pkgutil, unittest?

def keep\_pickleable(func):
func.\_\_name\_\_ = func.\_\_name\_\_.replace('\_deprecated\_', '')
func.\_\_qualname\_\_ = func.\_\_qualname\_\_.replace('\_deprecated\_', '')
return func

@keep\_pickleable
def \_deprecated\_old\_function(arg, other):
...

I would create more standard helpers (for deprecation, for lazy importing). This feature is helpful not by itself, but because it will be used for implementing new features. Using \_\_getattr\_\_ directly will need to write a boilerplate code. Maybe when implementing these helper you will discover that this PEP needs some additions.