Python import common lib error.

[Cemil Demir]

Hi,

I know, there is a closed similar issue (issue number 1375) about this problem.

But, i think, the problem is not solved completely.

I used the latest version and I got the error below by running "run_tdnn_7n.sh" script in "egs/swbd/local/chain/tuning" directory.

I got the error:

File "steps/nnet3/chain/train.py", line 19, in <module>
    import libs.nnet3.train.common as common_train_lib
  File "steps/libs/__init__.py", line 9, in <module>
    import common
ModuleNotFoundError: No module named 'common'

Do you have any suggestion solving this problem?

Thanks.

--

Cemil Demir

cemil...@gmail.com

[Daniel Povey]

Vimal, can you please look into this?

I suspect it has something to do with python3 disabling something called relative imports, but I don't 100% understand these types of issues.

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[Daniel Povey]

Daniel, can you give us a hint about the likely fix?

[Vimal Manohar]

The issue is related to this : https://www.python.org/dev/peps/pep-0328/

I have not yet found a fix.

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Vimal Manohar

PhD Student

Electrical & Computer Engineering

Johns Hopkins University

[Vimal Manohar]

I believe one solution is to replace all the `import common` etc. with `from . import common` and so on. It seems to work.

Vimal

[Daniel Povey]

From this

https://stackoverflow.com/questions/12172791/changes-in-import-statement-python3

it looks like you have to change

from base import BaseThing

to:

from .base import BaseThing

We could test this in python2.7 by adding

from __future__ import absolute_import

Dan

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Vimal Manohar

PhD Student

Electrical & Computer Engineering

Johns Hopkins University

[Daniel Povey]

Cecil, can you try just removing the following lines

import common

__all__ = ["common"]

from __init__.py in steps/libs/ ?

As far as I can tell, no-one is ever doing "import libs" so that stuff may not be needed at all.

I really don't know what the best practices are with those __init__.py files, but I do notice that in subdirectories of that directory, the __init__.py files are empty.

Dan

[Daniel Povey]

Wait, that won't work.  I'm working on a fix.

[Daniel Povey]

OK, I've merged a fix.

Cemil: the reason we didn't have this problem yet is presumably that no-one was previously running Kaldi's neural-net training on a system where python is python3.  So you may hit further bugs.  We will fix them though.

Dan