Created
May 24, 2012 20:58
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Decorators
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| from functools import update_wrapper | |
| def decorator(d): | |
| return lambda fn: update_wrapper(d(fn), fn) | |
| decorator = decorator(decorator) | |
| @decorator | |
| def n_ary(f): | |
| """Given binary function f(x, y), return an n_ary function such | |
| that f(x, y, z) = f(x, f(y,z)), etc. Also allow f(x) = x.""" | |
| def n_ary_f(x, *args): | |
| return x if not args else f(x, n_ary_f(*args)) | |
| return n_ary_f | |
| @n_ary | |
| def add(x,y): | |
| return x + y | |
| print add(2, 3, 4, 5, 6) |
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