[issue23447] Relative imports with __all__ attribute

[Antonio Cota]

New submission from Antonio Cota:

That's the situation:

a/
  __init__.py
  first.py
  second.py

#init.py
__all__ = ['second', 'first']
print('i\'m starting the directory')

#first.py
print('hi, i\'m the first')
from . import *

#second.py
print('hi, i\'m the second')

>From the interactive prompt:
>>> import a.first
i'm starting the directory
hi, i'm the first
hi, i'm the second
Traceback (most recent call last):
  File "", line 1, in 
  File "/home/antox/Scrivania/a/first.py", line 2, in 
from . import *
AttributeError: module 'a' has no attribute 'first'

It's pretty weird.

--
messages: 235761
nosy: antox
priority: normal
severity: normal
status: open
title: Relative imports with __all__ attribute
type: behavior
versions: Python 3.5

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[issue23447] Relative imports with __all__ attribute

[Antonio Cota]

Changes by Antonio Cota :


--
versions: +Python 3.4

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[issue23447] Relative imports with __all__ attribute

[Antonio Cota]

Antonio Cota added the comment:

I tried the following on python 3.5.0a1:

#init.py
__all__ = ['second', 'first']
print('i\'m starting the directory')

#first.py
print('hi, i\'m the first')
from . import second

#second.py
print('hi, i\'m the second')
from . import first

>>> import a.first
i'm starting the directory
hi, i'm the first
hi, i'm the second


it just worked out perfectly, no errors.
But the case I show before still continues to get the AttributeError error.
You told me that basically it doesn't work because it is a circular import, but 
isn't python already able to manage circular import?
What I expected when running the "from . import *" statament was Python looking 
up in the __all__ attribute and import everything within it. When it had to 
import 'first' I expected Python to check in the sys.modules to see if it was 
already imported so, in this case, it could see that first.py was already 
imported and no error was raised.

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[issue23447] Relative imports with __all__ attribute

[Antonio Cota]

Changes by Antonio Cota :


--
versions:  -Python 3.4

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