Hylang, or simply hy, is a LISP language that is built on top of the Python programming language.

The hymagic ipython extension allows you to execute hylang code interactively in a ipython console, qtconsole, or notebook.

You can install the hymagic package using

$ pip install hymagic

In[1]:

%load_ext hymagic

You can execute a hylang cell using the %%hylang magic as shown below.

In[2]:

%%hylang
(defn add1 [n]
    (+ n 1))

(print (add1 5))
(add1 11)

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12L

Since hylang code is executed as python AST nodes in the regular ipython kernel, you can freely intersperse hylang code and python code.

In[3]:

#Here we call the add1 function defined above in 
#regular python code
for i in range(4):
    print(add1(i))

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You can also use the %hylang magic to execute one line of code

In[4]:

a = 5
%hylang (setv a (add1 a)) 
a = a + 1
print(a)

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• Setup testing
• See if it is possible to hijack IPython's completion