Closures

[Gustavo Niemeyer]

Would you trade the "mutable integer" and "count(n=[0])" kludges for a

solution like &count ? Does anyone agree with me that a "closure
variable prefix" is more explicit and readable?

import sys

class Closure:
def __init__(self):
self.__dict__ = sys._getframe().f_back.f_locals

def getFunc():
counter = 0
c = Closure()
def count():
c.counter += 1
print c.counter
return count

c = getFunc()
c()
c()
c()

 

[Michele Simionato]

import sys

class Closure:
def __init__(self):
self.__dict__ = sys._getframe().f_back.f_locals

def getFunc():
counter = 0
c = Closure()
def count():
c.counter += 1
print c.counter
return count

c = getFunc()
c()
c()
c()

This is a nice hack! Why not to make it available as a Cookbook recipe?

Michele Simionato