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Futhark language embedding into IPython

Project description

Embed Futhark code into your favourite IPython shells and Notebooks.


You should have a working version of Futhark in your $PATH. To do so, read the installation instructions on

Then install ipython-futhark using pip:

  • ipython futhark only: $ pip install ipython-futhark

  • Installing pyopencl along the way: $ pip install ipython-futhark[opencl]


See the Notebook demo

IPython 5.4.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: %load_ext futhark

In [2]: %%futhark gpu
   ...: let main(): i32 = 42
Warning: Device limits tile size to 22 (setting was 32)

In [3]: main()
Out[3]: 42

In [4]: %%futhark inspect gpu
   ...: let main(): f32 = 42
In: main(): f32 = 42
Declaration of function main at tmpDWm0Zs.fut:1:5-1:5 declares return type f32, but body has type i32
If you find this error message confusing, uninformative, or wrong, please open an issue at

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