Import error theano "cannot import gof name"

Question

I'm currently getting an error

ImportError: cannot import name gof

when importing theano.

>>> import theano Traceback (most recent call last): File "<pyshell#3>", line 1, in <module> import theano File "C:\Python27\lib\site-packages\theano\__init__.py", line 63, in <module> from theano.compile import ( File "C:\Python27\lib\site-packages\theano\compile\__init__.py", line 9, in <module> from theano.compile.function_module import * File "C:\Python27\lib\site-packages\theano\compile\function_module.py", line 16, in <module> from theano import gof ImportError: cannot import name gof 

I am using python 2.7.10 (). Theano is installed using pip install --upgrade --no-deps git+git://github.com/Theano/Theano.git . We hope that you will offer a solution to this problem.

Answer 1

In most cases, when I see this error, it is caused by two errors:

1) Syntax error in Theano. Update Theano and make sure that you do not have a local modification. I observed this mistake with Master Teano, but just in case.

2) When several versions of Theano are installed that are installed.

In both cases, uninstall the entire version of Theano. Do this several times to make sure that they are not there. Then install again.

From memory, this always solved the problem when it was not a syntax error during development (but not in the main version of Theano that you are using)

Answer 2

This ImportError may be caused by Theano being unable to compile the gof module gof . If so, you will see an error message that looks like " Exception: Compilation Failed (return status=1): C:\Long\Path\...\mod.cpp:1: sorry, unimplemented: 64-bit mode not compiled in ".

Commit with Conda

If you install theano in a conda environment, make sure you have the C compiler available for that environment.

Team

 conda install m2w64-toolchain 

will provide a C compiler for your environment that is isolated from the rest of the machine.

After the m2w64-toolchain package is installed, import theano should work

Manual Lock

If you install Theano yourself, two points from these topics may help:

• Install the bleeding version of Theano
• Install libpython from http://www.lfd.uci.edu/%7Egohlke/pythonlibs/

Answer 3

I assume that you are using Windows 7 or later.

If you installed Python Anaconda, open Windows Powershell or Command Prompt and type conda install mingw libpython before entering pip install theano

Alternatively, if you do not have Anaconda, download these packages from

• anaconda.org/anaconda/mingw/files
• anaconda.org/anaconda/libpython/files
• github.com/Theano/Theano

Then open a command prompt, navigate to each folder and enter python setup.py install

Now run Python and import theano

Possible mistakes:

If you get a RuntimeError: " To use MKL 2018 with Theano, you MUST set" MKL_THREADING_LAYER = GNU "in your environement, " then

• Go to Control Panel> System> Advanced System Settings and select "Environment Variables".

• In the "System variables" section, enter the new variable name MKL_THREADING_LAYER and set its GPU value

If you get other kinds of errors, try the following:

• Make an empty file named .theanorc (file extension without file name) in your home folder C: \ Users \ <username>. If you get the error message "You must enter a file name", see https://stackoverflow.com/a/4646/

• Open .theanorc and write the following:

   [global] cxx=C:\<path to Anaconda>\Anaconda3\MinGW\bin\g++.exe 

• Run Python again and import theano. If this works, you can remove .theanorc