lutorpy, importing Error:

[aquibjaved]

I've installed torch 7 and then I fire the command
sudo ~/torch/install/bin/luarocks install image
sudo ~/torch/install/bin/luarocks install nn
sudo pip install lutorpy
But now when I am in terminal python:
`aquib@javed:~$ python
Python 2.7.12 (default, Nov 19 2016, 06:48:10)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.

import lutorpy
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python2.7/dist-packages/lutorpy/init.py", line 17, in
lualib = ctypes.CDLL(os.path.join(TorchInstallPath, "lib/libluajit.so"), mode=ctypes.RTLD_GLOBAL)
File "/usr/lib/python2.7/ctypes/init.py", line 362, in init
self._handle = _dlopen(self._name, mode)
OSError: /home/aquib/torch/install/lib/libluajit.so: cannot open shared object file: No such file or directory

import lutorpy as lua
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python2.7/dist-packages/lutorpy/init.py", line 12, in
from lutorpy import torch_path
ImportError: cannot import name torch_path
`
how can I fix it?

[oeway]

You have problem in detecting the torch path, I suggest you do a reinstallation of lutorpy.

[aquibjaved]

Hi @oeway , I tried this also but I am getting the same error:
I uninstall the lutorpy by using pip uninstall lutorpy

Then I downloaded the lutorpy from github and run the command:
sudo python setup.py install

>>> import lutorpy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/lutorpy-1.3.7-py2.7-linux-x86_64.egg/lutorpy/__init__.py", line 17, in <module>
    lualib = ctypes.CDLL(os.path.join(TorchInstallPath, "lib/libluajit.so"), mode=ctypes.RTLD_GLOBAL)
  File "/usr/lib/python2.7/ctypes/__init__.py", line 362, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: /home/aquib/torch/install/lib/libluajit.so: cannot open shared object file: No such file or directory

[oeway]

can you check if you have "/home/aquib/torch/install/lib/libluajit.so" exist?

[aquibjaved]

Hi @oeway , I just checked my folders and I didn't find file named "libluajit.so"

[oeway]

Ok, so that's the problem. Please give more details on your installation, system(mac osx is not supported so far), and did you install torch with the default way? Could you list the torch/install/lib folder see if there is a file named libluajit?

[aquibjaved]

I am using Ubuntu 16.04,

I followed the following steps from this page http://torch.ch/docs/getting-started.html#_

git clone https://github.com/torch/distro.git ~/torch --recursive
cd ~/torch

# clean old torch installation
./clean.sh
# optional clean command (for older torch versions)
# curl -s https://raw.githubusercontent.com/torch/ezinstall/master/clean-old.sh | bash

# https://github.com/torch/distro : set env to use lua
TORCH_LUA_VERSION=LUA52 ./install.sh
New packages can be installed using Luarocks from the command-line:

# run luarocks WITHOUT sudo
$ luarocks install image
$ luarocks list

[oeway]

Hi @aquibjaved , I see the problem, because lutorpy assume one install the luajit with torch, but you used lua5.2. The easiest solution would be install torch with luajit(the default installation), is there a particular reason for you to choose lua5.2? Otherwise we have to figure out how to use lua5.2 rather than luajit.

[aquibjaved]

Hi @oeway, I don't need any specific lua version, I just want to make import lutorpy work.
What I have to do now?

[aquibjaved]

How do I proceed now? Do I need to install it again from beginning?

[oeway]

you need to reinstall torch with luajit, not LUA5.2. Run the following command: ``` # in a terminal, run the commands WITHOUT sudo git clone https://github.com/torch/distro.git ~/torch --recursive cd ~/torch ./clean.sh bash install-deps ./install.sh ``` Don't add `TORCH_LUA_VERSION=LUA52` in front of `./install.sh`.

[aquibjaved]

Can I add bash install-deps after ./install.sh, I did the installation without it, It's taking around 2 hours for the installation.

[oeway]

you can try ./install.sh without bash install-deps, if it succeed, then I think you don't even need install-deps. That's because you have installed all the dependencies when you install torch for the very first time.

[aquibjaved]

Hi @oeway , I did the installation again, and when I enter th in terminal torch window open.
But While importing Lutorpy the error now I am getting is:

Python 2.7.12 (default, Nov 19 2016, 06:48:10) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import lutorpy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/lutorpy/__init__.py", line 58, in <module>
    from lutorpy._lupa import *
ImportError: /usr/local/lib/python2.7/dist-packages/lutorpy/_lupa.so: undefined symbol: lua_rawlen