Matlab called python Theano Module Wrong

[VeritasYin]

Hi! Recently, we tried to reproduce the experiment, but at the visualization part (script_viz_policy.m) has to use MATLAB call python code (vin.py). In this part, the code imports theano module (which I have already installed). But it reported an err: Undefined variable "py" or class "py.vin.vin".

Error in script_viz_policy (line 3) tmp = py.vin.vin; clear tmp; % to load Python

And I followed instruction of Matlab Online Help, used command py.importlib.import_module('vin') for test, and still reported an err:

Error using theano_utils> (line 3) Python Error: ImportError: No module named theano

Error in vin> (line 3) from theano_utils import *

Error in init>import_module (line 37) import(name)

But I can import theano in python,

import theano import theano.tensor as T theano.test() Theano version 0.8.2 theano is installed in //anaconda/lib/python2.7/site-packages/theano NumPy version 1.11.1 NumPy relaxed strides checking option: False NumPy is installed in //anaconda/lib/python2.7/site-packages/numpy Python version 2.7.12 |Anaconda 4.2.0 (x86_64)| (default, Jul 2 2016, 17:43:17) [GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)] nose version 1.3.7

I couldn't figure out where is the problem. Thank you in advance!

[avivt]

Hi,

Looks like a path problem.

First of all - what Matlab version do you have, and can you import other (not VIN) python packages?

Second - can you try following the advice on this page: https://www.mathworks.com/help/matlab/matlab_external/undefined-variable-py-or-function-py-command.html#buiebj2-71 to fix the python path error (seems like you need to add the path to theano)?

Let me know if this works.

Best, Aviv

On Mon, Jan 30, 2017 at 4:57 AM, VeritasPotter notifications@github.com wrote:

Hi! Recently, we tried to reproduce the experiment, but at the visualization part (script_viz_policy.m) has to use MATLAB call python code (vin.py). In this part, the code imports theano module (which I have already installed). But it reported an err: Undefined variable "py" or class "py.vin.vin".

Error in script_viz_policy (line 3) tmp = py.vin.vin; clear tmp; % to load Python

And I followed instruction of Matlab Online Help, used command py.importlib.import_module('vin') for test, and still reported an err:

Error using theano_utils> (line 3) Python Error: ImportError: No module named theano

Error in vin> (line 3) from theano_utils import *

Error in init>import_module (line 37) import(name)

But I can import theano in python,

import theano import theano.tensor as T theano.test() Theano version 0.8.2 theano is installed in //anaconda/lib/python2.7/site-packages/theano NumPy version 1.11.1 NumPy relaxed strides checking option: False NumPy is installed in //anaconda/lib/python2.7/site-packages/numpy Python version 2.7.12 |Anaconda 4.2.0 (x86_64)| (default, Jul 2 2016, 17:43:17) [GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)] nose version 1.3.7

I couldn't figure out where is the problem. Thank you in advance!

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[VeritasYin]

Hi, Aviv!

It still doesn't work on Matlab R2016b.

I followed the instruction of Matlab documents, added the path into python.

P = py.sys.path; P

P =

Python list with no properties.

['/Users/veritas/Desktop/vin', '/anaconda/lib/python2.7/site-packages/theano', '', '/usr/lib/python27.zip', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-darwin', '/usr/lib/python2.7/plat-mac', '/usr/lib/python2.7/plat-mac/lib-scriptpackages', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/Library/Python/2.7/site-packages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC']

I can import my own python file like mymod.py and module like numpy with no problems,

py.importlib.import_module('mymod')

ans =

Python module with properties:

theend: [1×1 py.function]
search: [1×1 py.function]

<module 'mymod' from 'mymod.pyc'>

py.importlib.import_module('numpy')

ans =

Python module with properties:

                 loadtxt: [1×1 py.function]
              reciprocal: [1×1 py.numpy.ufunc]

......

But if I want to import theano or vin.py, it reported errors:

py.importlib.import_module('theano') Error using init>import_module (line 37) Python Error: ImportError: No module named theano

py.importlib.import_module('vin') Error using theano_utils> (line 3) Python Error: ImportError: No module named theano

Error in vin> (line 3) from theano_utils import *

Error in init>import_module (line 37) import(name)

And also, the path for theano is a dictionary, maybe this method only works for a file (Matlab tries to find a file named theano.py?) rather a dictionary. But still, numpy is also a dic, so I am confused.

Many thanks, veritas

[xiong-j]

I am having a similar problem. is your problem solved?