I have python 3.1.2 fetched from the main site.

imagine two source files:

a.py:
-------
# coding: cp1251
import b;
print('A');
-------

b.py:
-------
print('B');
-------

Both reside in the same directory containing at least one non-ascii character (try 0xdb) in the _path_.

import will fail with an empty error!
#coding here works fine with utf-8 and fails using any other one

now tell me how the hell can file system encoding be related to file content encoding?!

I've attached the source

This bug is maybe related to #8611?

Can you try with py3k (python 3.2)?

Is there py3k for win32?
And how do I know if #8611 comes from the same source?
Have no idea how they have organized the python core. I'm new to python (about 2 months) and I don't think I will use it for long. It's just not serious.

> now tell me how the hell can file system encoding be related 
> to file content encoding?!

Why do you say so? I can reproduce your issue, but changing the first line of a.py:
# coding: cp1252
to:
# coding: utf-8
did not change anything.

In the meantime, you should refrain from creating directories with characters not representable in the terminal window.

@haypo: The problem still exists with py3k at r82150.

@Amaury:
What you're saying about directory naming is right indeed.
But the case has begun from cyrillic letters in the NTFS path, which I do not use, but the users of my soft do. So putting the program into such directory makes the former unuseable; until the sources are in utf anyway.

I just ran this on another computer and it seemed to work with #coding in a.py. I then added this line to b.py and it failed. I played about 15 minutes inserting the line and removing and changing the directory name.
And I can tell the behaviour for me looks just random!
Though I noticed that addding #coding line to both sources fails more often.

You'll see:
--------
Traceback (most recent call last):
  File "F:\1home\С\u201e\a.py", line 1, in <module>
SyntaxError: None
--------

And what the hell is this u201e? That should have been a letter!

> File "F:\1home\С\u201e\a.py", line 1, in <module>
> And what the hell is this u201e? That should have been a letter!

It's probably this symbol: http://www.eki.ee/letter/chardata.cgi?ucode=201e
but it has no representation in the console windows you are using; try "import sys; print(sys.stderr.encoding)" to print the code page used by your console.
In error messages, Python replaces unpritable characters with their "escaped" form: \uXXXX where XXXX is the character number.

> But the case has begun from cyrillic letters in the NTFS path, 
> which I do not use, but the users of my soft do. 
> So putting the program into such directory makes the former unuseable;
> until the sources are in utf anyway.

I agree that cyrillic letters in the path makes the program unusable. This is the bug to fix, and the zip file you attached is a good test case.

But I still don't see how "the sources are in utf" can influence this. Please show me!

Did you read my first comment? "This bug is maybe related to #8611"

@Amaury:
Removing #coding lines or replacing them with #coding: utf-8 makes this test case working, at least on 4 computers I have been able to test this.

My initial program was consisting of roughly ten files and utf-8 made it work.

@haypo:
"maybe"...

Here is what I did, on a machine running Windows XP, with python 3.1.1:
- I used 7-zip to extract the attached zip file, in the c:\temp directory.
- Then I opened a command prompt, here is an exact copy of the session:
C:>cd \temp\█

C:\temp\█>dir
 Le volume dans le lecteur C s'appelle Disque dur
 Le numéro de série du volume est D4BA-260C

 Répertoire de C:\temp\█

03/07/2010  11:10    <REP>          .
03/07/2010  11:10    <REP>          ..
08/06/2010  09:13                44 a.py
08/06/2010  14:21                11 b.py
               2 fichier(s)               55 octets
               2 Rép(s)  58 733 801 472 octets libres

C:\temp\█>c:\Python31\python.exe a.py
Traceback (most recent call last):
  File "a.py", line 3, in <module>
    import b;
ImportError: No module named b

C:\temp\█>notepad a.py
[Replaced encoding with "utf-8", then save and quit]

C:\temp\█>c:\Python31\python.exe a.py
Traceback (most recent call last):
  File "a.py", line 2, in <module>
    import b;
ImportError: No module named b

@Amaury:
Just fine!
It's either another bug in python or 3.1.1 specifics.

> Just fine!
> It's either another bug in python or 3.1.1 specifics.

What do you mean? what is 'it'? The error I in the session above shows the bug we described first (strange letters in the path makes the program unusable), and shows that the file's encoding doesn't change this.

@Amaury:
error message for my bug was:
SyntaxError: None
and for your:
ImportError: No module named b

We've got at least two bugs in one testcase

Then please tell us how to reproduce the "SyntaxError" case

I wrote a patch on import machinery to support unicode characters: see #9425.

I tested pybug-import-coding.zip on Windows with my import_unicode branch (see #9425): it works correctly, whereas it fails with py3k (Python 3.2).

I tested the example with Python 3.2 (r85691) and the issue looks to be fixed. Can someone else confirm that?

I decompressed the ZIP archive, moved into the directory containing a.py and b.py, and called \path\to\python.exe a.py: it works.

See also #3080 for the full unicode support in the import machinery.

Works for me using 3.4.1 and 3.5.0a0.

I think this can be closed as out of date.

> See also #3080 for the full unicode support in the import machinery.

I'm confident that I fixed this issue in bpo-3080. I mark this one as a duplicate.