Is there a `pathlib` equivalent of `os.scandir()`?

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I’m not sure what expectations about objects you’re referring to, but I think it’s entirely viable and makes perfect sense to add the stats caching performed by os.scandir into the Path objects, since those os.DirEntry objects that os.scandir generates have direct 1-to-1 corresponding methods in Path objects.

To quote the documentation of os.DirEntry:

Note that there is a nice correspondence between several attributes and methods of os.DirEntry and of pathlib.Path. In particular, the name attribute has the same meaning, as do the is_dir() , is_file() , is_symlink() , is_junction() , and stat() methods.

Here’s a quick implementation of a scandir method for a Path object that generates Path objects instead of os.DirEntry objects:

import os
from pathlib import WindowsPath, PosixPath

class ScannablePath(WindowsPath if os.name == 'nt' else PosixPath):
    def scandir(self):
        yield from map(CachedPath, os.scandir(self))

class CachedPath(ScannablePath):
    def __new__(cls, dir_entry):
        path = super().__new__(cls, dir_entry.path)
        path._dir_entry = dir_entry
        return path

    is_dir = lambda self: self._dir_entry.is_dir()
    is_file = lambda self: self._dir_entry.is_file()
    is_symlink = lambda self: self._dir_entry.is_symlink()
    is_junction = lambda self: self._dir_entry.is_junction()
    stat = lambda self: self._dir_entry.stat()

for path in ScannablePath('/').scandir():
    print(path.name, path.is_dir(), path.stat().st_size)

Demo here