Hylang - A Python powered Lisp AND a Lisp powered Python

Hylang is a lisp that is written in python that compiles down to python itself. This is a talk given during the Chennaipy February meetup 2015.

Transcript

1. ( Chennaipy Feb 2015
2. Hy!
3. Shrayas Logic Soft
4. A Lisp powered Python
5. A Python powered Lisp
6. Lisp
7. Lisp?
8. John McCarthy 1958
9. Polish Notation
10. 1+1
11. INFIX 1+1
12. + 1 1
13. + 1 1 POLISH
14. (+ 1 1)
15. (+ 1 1) S-EXPRESSIONS
16. (+ 1 1) S-EXPRESSIONS Function
17. (+ 1 1) S-EXPRESSIONS Arguments
18. Variable Arity!
19. 1 + 2 + 3 + 4 + 5 Infix
20. (+ 1 2 3 4 5) 1 + 2 + 3 + 4 + 5 Infix S-Expressions
21. Dialects
22. Dialects Arc, AutoLISP, Clojure, Common Lisp, Emacs Lisp, EuLisp, Franz Lisp, Interlisp, ISLISP, LeLisp, LFE, Maclisp, MDL, Newlisp, NIL, Picolisp, Portable Standard Lisp, Racket, Scheme, SKILL, Spice Lisp, T, XLISP, Zetalisp
23. Dialects Arc, AutoLISP, Clojure, Common Lisp, Emacs Lisp, EuLisp, Franz Lisp, Interlisp, ISLISP, LeLisp, LFE, Maclisp, MDL, Newlisp, NIL, Picolisp, Portable Standard Lisp, Racket, Scheme, SKILL, Spice Lisp, T, XLISP, Zetalisp
25. hylang.org @paultag et al.
26. Getting & Running $ pip install hy $ hy
27. Lisp
28. Lisp in Python
29. Why?
30. Pythonic Lisp 1
31. Absurd Powers!!!!1 2
32. Learn Lisp 3
33. SICP
34. Great Py Interop 4
35. Code!
36. def say_hello(name): print "Hello", name if __name__ == "__main__": say_hello("Python") python Hello, python
37. def say_hello(name): print "Hello", name if __name__ == "__main__": say_hello("Python") (defn say_hello [name] (print "Hello" name)) (if (= __name__ "__main__") (say_hello "python")) python hylang Hello, python
38. python Data Structures >>> [1,2,3] >>> {"foo": 1, "bar": 2, "baz": 3} >>> (1,2,3)
39. python hylang Data Structures >>> [1,2,3] >>> {"foo": 1, "bar": 2, "baz": 3} >>> (1,2,3) => [1 2 3] => {"foo" 1 "bar" 2 "baz" 3} => (, 1 2 3)
40. python Fn on Objects >>> "Hello World".upper() ”HELLO WORLD"
41. python hylang Fn on Objects >>> "Hello World".upper() ”HELLO WORLD" ⇒ (.upper "Hello world") "HELLO WORLD"
42. python Conditionals if (foo > 5): print "foo more than 5!" else: print "foo less than 5!"
43. python hylang Conditionals if (foo > 5): print "foo more than 5!" else: print "foo less than 5!" (if (> foo 5) (print "foo more than 5!") (print "foo less than 5!"))
44. python Conditionals (more) if (foo > 7): print "Too much" elif (foo < 7): print "Too less" else: print "ok :)"
45. hylang Conditionals (more) (cond [(> foo 7) (print "Too much")] [(< foo 7) (print "Too less")] [true (print "ok :)")])
46. python Loops for i in xrange(10): print i
47. python hylang Loops for i in xrange(10): print i (for [i (xrange 10)] (print i))
48. hylang Hy import Py (import os) (if (not (os.path.isdir "/foo/bar")) (os.mkdir "/foo/bar"))
49. hylang (hymath.hy) Interop! (defn square [x] "returns square of x" (* x x))
50. python (usemath.py) hylang (hymath.hy) Interop! (defn square [x] "returns square of x" (* x x)) import hy import hymath print hymath.square(8)
51. Recap
52. hylang is a pythonic lisp 1 Recap
53. hylang is a pythonic lisp 1 Has great interop with python 2 Recap
54. hylang is a pythonic lisp 1 Has great interop with python 2 Great excuse to learn Lisp 3 Recap
55. hylang is a pythonic lisp 1 Has great interop with python 2 Great excuse to learn Lisp 3 A new language 4 Recap
56. Fin @shrayasr