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It is NOT a page to discuss about decorator syntax! It is NOT a page to discuss decorator syntax!
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== Memoize ==

Here's a memoizing class.

inline:memoize.py

== Pseudo-currying ==

{{{
#!python
class curried(object):
  """
  Decorator that returns a function that keeps returning functions
  until all arguments are supplied; then the original function is
  evaluated.
  """

  def __init__(self, func, *a):
    self.func = func
    self.args = a
  def __call__(self, *a):
    args = self.args + a
    if len(args) < self.func.func_code.co_argcount:
      return curried(self.func, *args)
    else:
      return self.func(*args)


@curried
def add(a, b):
    return a+b

add1 = add(1)

print add1(2)

}}}

This page is meant to be a central repository of decorator code pieces, whether useful or not <wink>. It is NOT a page to discuss decorator syntax!

Feel free to add your suggestions (please use the current decorator syntax @dec)!

Memoize

Here's a memoizing class.

inline:memoize.py

Pseudo-currying

   1 class curried(object):
   2   """
   3   Decorator that returns a function that keeps returning functions
   4   until all arguments are supplied; then the original function is
   5   evaluated.
   6   """
   7 
   8   def __init__(self, func, *a):
   9     self.func = func
  10     self.args = a
  11   def __call__(self, *a):
  12     args = self.args + a
  13     if len(args) < self.func.func_code.co_argcount:
  14       return curried(self.func, *args)
  15     else:
  16       return self.func(*args)
  17 
  18 
  19 @curried
  20 def add(a, b):
  21     return a+b
  22 
  23 add1 = add(1)
  24 
  25 print add1(2)

PythonDecoratorLibrary (last edited 2017-07-04 09:44:35 by mjpieters)

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