gophernotes - Use Go in Jupyter notebooks and nteract

gophernotes is a Go kernel for Jupyter notebooks and nteract. It lets you use Go interactively in a browser-based notebook or desktop app. Use gophernotes to create and share documents that contain live Go code, equations, visualizations and explanatory text. These notebooks, with the live Go code, can then be shared with others via email, Dropbox, GitHub and the Jupyter Notebook Viewer. Go forth and do data science, or anything else interesting, with Go notebooks!

Acknowledgements - This project utilizes a Go interpreter called gomacro under the hood to evaluate Go code interactively. The gophernotes logo was designed by the brilliant Marcus Olsson and was inspired by Renee French's original Go Gopher design.

Examples
Install gophernotes:
- Prerequisites
- Linux
- Mac
- Windows
- Docker
Getting Started
Limitations
Troubleshooting

Examples

Jupyter Notebook:

nteract:

Example Notebooks (dowload and run them locally, follow the links to view in Github, or use the Jupyter Notebook Viewer):

Installation

Prerequisites

Go 1.9+ - including GOPATH/bin added to your PATH (i.e., you can run Go binaries that you go install).
Jupyter Notebook or nteract
ZeroMQ 4.X.X - for convenience, pre-built Windows binaries (v4.2.1) are included in the zmq-win directory.
pkg-config

Linux

$ go get -u github.com/gopherdata/gophernotes
$ mkdir -p ~/.local/share/jupyter/kernels/gophernotes
$ cp $GOPATH/src/github.com/gopherdata/gophernotes/kernel/* ~/.local/share/jupyter/kernels/gophernotes

To confirm that the gophernotes binary is installed and in your PATH, you should see the following when running gophernotes directly:

$ gophernotes
2017/09/20 10:33:12 Need a command line argument specifying the connection file.

Note - if you have the JUPYTER_PATH environmental variable set or if you are using an older version of Jupyter, you may need to copy this kernel config to another directory. You can check which directories will be searched by executing:

$ jupyter --data-dir

Mac

Important Note - gomacro relies on the plugin package when importing third party libraries. This package is only supported on Linux currently. Thus, if you need to utilize third party packages in your Go notebooks and you are running on Mac, you should use the Docker install and run gophernotes/Jupyter in Docker.

$ go get github.com/gopherdata/gophernotes
$ mkdir -p ~/Library/Jupyter/kernels/gophernotes
$ cp $GOPATH/src/github.com/gopherdata/gophernotes/kernel/* ~/Library/Jupyter/kernels/gophernotes

To confirm that the gophernotes binary is installed and in your PATH, you should see the following when running gophernotes directly:

$ gophernotes
2017/09/20 10:33:12 Need a command line argument specifying the connection file.

$ jupyter --data-dir

Windows

Important Note - gomacro relies on the plugin package when importing third party libraries. This package is only supported on Linux currently. Thus, if you need to utilize third party packages in your Go notebooks and you are running on Windows, you should use the Docker install and run gophernotes/Jupyter in Docker.

Make sure you have the MinGW toolchain:

MinGW-w64, for 32 and 64 bit Windows
MinGW Distro, for 64 bit Windows only

Then:

build and install gophernotes (using the pre-built binaries and zmq-win\build.bat):

REM Download w/o building.
go get -d github.com/gopherdata/gophernotes
cd %GOPATH%\src\github.com\gopherdata\gophernotes\zmq-win

REM Build x64 version.
build.bat amd64
move gophernotes.exe %GOPATH%\bin
copy lib-amd64\libzmq.dll %GOPATH%\bin

REM Build x86 version.
build.bat 386
move gophernotes.exe %GOPATH%\bin
copy lib-386\libzmq.dll %GOPATH%\bin

Copy the kernel config:
```
mkdir %APPDATA%\jupyter\kernels\gophernotes
xcopy %GOPATH%\src\github.com\gopherdata\gophernotes\kernel %APPDATA%\jupyter\kernels\gophernotes /s
```
Note, if you have the JUPYTER_PATH environmental variable set or if you are using an older version of Jupyter, you may need to copy this kernel config to another directory. You can check which directories will be searched by executing:
```
jupyter --data-dir
```
Update %APPDATA%\jupyter\kernels\gophernotes\kernel.json with the FULL PATH to your gophernotes.exe (in %GOPATH%\bin), unless it's already on the PATH. For example:
```
{
    "argv": [
      "C:\\gopath\\bin\\gophernotes.exe",
      "{connection_file}"
      ],
    "display_name": "Go",
    "language": "go",
    "name": "go"
}
```

Docker

You can try out or run Jupyter + gophernotes without installing anything using Docker. To run a Go notebook that only needs things from the standard library, run:

$ docker run -it -p 8888:8888 gopherdata/gophernotes

Or to run a Go notebook with access to common Go data science packages (gonum, gota, golearn, etc.), run:

$ docker run -it -p 8888:8888 gopherdata/gophernotes-ds

In either case, running this command should output a link that you can follow to access Jupyter in a browser. Also, to save notebooks to and/or load notebooks from a location outside of the Docker image, you should utilize a volume mount. For example:

$ docker run -it -p 8888:8888 -v /path/to/local/notebooks:/path/to/notebooks/in/docker gopherdata/gophernotes

Getting Started

Jupyter

If you completed one of the local installs above (i.e., not the Docker install), start the jupyter notebook server:
```
jupyter notebook
```
Select Go from the New drop down menu.
Have fun!

nteract

Launch nteract.
From the nteract menu select Language -> Go.
Have fun!

Limitations

gophernotes uses gomacro under the hood to evaluate Go code interactively. You can evaluate most any Go code with gomacro, but there are some limitation, which are discussed in further detail here. Most noteably, gophernotes does NOT support:

third party packages when running natively on Mac and Windows - This is a current limitation of the Go plugin package.
unexported struct fields
interfaces - They can be declared, but nothing more: there is no way to implement them or call their methods
extracting methods from types - For example time.Duration.String should return a func(time.Duration) string but currently gives an error. Instead extracting methods from objects is supported: time.Duration(1s).String correctly returns a func() string
goto
named return values

named imports like:

import tf "github.com/tensorflow/tensorflow/tensorflow/go"

Troubleshooting

gophernotes not found

Depending on your environment, you may need to manually change the path to the gophernotes executable in kernel/kernel.json before copying it to ~/.local/share/jupyter/kernels/gophernotes. You can put the full path to the gophernotes executable here, and you shouldn't have any further issues.

"Kernel error" in a running notebook

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/notebook/base/handlers.py", line 458, in wrapper
    result = yield gen.maybe_future(method(self, *args, **kwargs))
  File "/usr/local/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
    value = future.result()
  ...
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1335, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Stop jupyter, if it's already running.

Add a symlink to /go/bin/gophernotes from your path to the gophernotes executable. If you followed the instructions above, this will be:

sudo ln -s $HOME/go/bin/gophernotes /go/bin/gophernotes

Restart jupyter, and you should now be up and running.

shyamalschandra / gophernotes Goto Github PK

gophernotes's Introduction