If you have a __future__ import in a script, and you import * from it in another script, the object for this future appears in the dir() of the other script, even though the __future__ import has no effect there. % cat x.py from __future__ import annotations % cat y.py from x import *
print(dir()) class D: def f(self, a: D): return 42 % ./python.exe y.py ['__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'annotations'] Traceback (most recent call last): File "/Users/iritkatriel/src/cpython-654/y.py", line 5, in <module> class D: ^^^^^^^^ File "/Users/iritkatriel/src/cpython-654/y.py", line 6, in D def f(self, a: D): ^ NameError: name 'D' is not defined I think we should change import * to exclude the __future__ import objects, and perhaps also to not show them in dir(x). Any objections? This came up in the discussion about https://bugs.python.org/issue26120 . See the attached PR for a technique we can use to identify those objects.
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