Unable to import trainer

[lightning-ai]

Unable to import trainer

[williamFalcon]

post code here.

Generally in python it would be:

from python_lightning import Trainer

Look at the demo here for instructions:
https://github.com/williamFalcon/pytorch-lightning#how-do-i-do-use-it

[sameerIISc]

From command line itself it is not able to import. Importing pytorch_lightning is working though.

import pytorch_lightning
from pytorch_lightning import Trainer
Traceback (most recent call last):
File "", line 1, in
ImportError: cannot import name Trainer

[williamFalcon]

  Found existing installation: pytorch-lightning 0.3.6.9
    Uninstalling pytorch-lightning-0.3.6.9:
      Successfully uninstalled pytorch-lightning-0.3.6.9
  Running setup.py develop for pytorch-lightning
Successfully installed pytorch-lightning test-tube-0.6.7.6
(lightning) user:~/Developer/pytorch-lightning$ python
Python 3.7.3 (default, Mar 27 2019, 22:11:17)
[GCC 7.3.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pytorch_lightning
>>> from pytorch_lightning import Trainer
>>>

Seems strange. I just tried, it works. Tests also work...

Maybe it's your install?

What does your conda env look like? Are you also using the latest lightning version?

[sameerIISc]

Even after re-installation, same problem persists.

(sameer27) ece@ece-System-Product-Name:~$ pip install pytorch_lightning
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Collecting pytorch_lightning
Collecting test-tube (from pytorch_lightning)
Requirement already satisfied: torch in ./anaconda2/envs/sameer27/lib/python2.7/site-packages (from pytorch_lightning) (1.1.0)
Requirement already satisfied: tqdm in ./anaconda2/envs/sameer27/lib/python2.7/site-packages (from pytorch_lightning) (4.32.2)
Requirement already satisfied: numpy>=1.13.3 in ./.local/lib/python2.7/site-packages (from test-tube->pytorch_lightning) (1.14.0)
Requirement already satisfied: pandas>=0.20.3 in ./anaconda2/envs/sameer27/lib/python2.7/site-packages (from test-tube->pytorch_lightning) (0.24.2)
Requirement already satisfied: future in ./anaconda2/envs/sameer27/lib/python2.7/site-packages (from test-tube->pytorch_lightning) (0.17.1)
Requirement already satisfied: tb-nightly==1.15.0a20190708 in ./anaconda2/envs/sameer27/lib/python2.7/site-packages (from test-tube->pytorch_lightning) (1.15.0a20190708)
Requirement already satisfied: imageio>=2.3.0 in ./anaconda2/envs/sameer27/lib/python2.7/site-packages (from test-tube->pytorch_lightning) (2.5.0)
Requirement already satisfied: pytz>=2011k in ./.local/lib/python2.7/site-packages (from pandas>=0.20.3->test-tube->pytorch_lightning) (2017.3)
Requirement already satisfied: python-dateutil>=2.5.0 in ./.local/lib/python2.7/site-packages (from pandas>=0.20.3->test-tube->pytorch_lightning) (2.6.1)
Requirement already satisfied: grpcio>=1.6.3 in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (1.21.1)
Requirement already satisfied: absl-py>=0.4 in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (0.7.1)
Requirement already satisfied: protobuf>=3.6.0 in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (3.8.0)
Requirement already satisfied: futures>=3.1.1; python_version < "3" in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (3.2.0)
Requirement already satisfied: wheel; python_version < "3" in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (0.33.4)
Requirement already satisfied: werkzeug>=0.11.15 in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (0.15.4)
Requirement already satisfied: markdown>=2.6.8 in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (3.1.1)
Requirement already satisfied: six>=1.10.0 in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (1.12.0)
Requirement already satisfied: setuptools>=41.0.0 in ./.local/lib/python2.7/site-packages (from tb-nightly==1.15.0a20190708->test-tube->pytorch_lightning) (41.0.1)
Requirement already satisfied: pillow in ./.local/lib/python2.7/site-packages (from imageio>=2.3.0->test-tube->pytorch_lightning) (5.0.0)
Requirement already satisfied: enum34 in ./.local/lib/python2.7/site-packages (from imageio>=2.3.0->test-tube->pytorch_lightning) (1.1.6)
Installing collected packages: test-tube, pytorch-lightning
Successfully installed pytorch-lightning-0.0.2 test-tube-0.6.7.6
(sameer27) ece@ece-System-Product-Name:~$ python
Python 2.7.16 |Anaconda, Inc.| (default, Mar 14 2019, 21:00:58) 
[GCC 7.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pytorch_lightning
>>> from pytorch_lightning import Trainer
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name Trainer

[williamFalcon]

oh yeah, use python 3+. Recommended 3.7

[sameerIISc]

Ok, I will try it. Thanks a lot.