En Sat, 28 May 2011 14:05:16 -0300, Steven D'Aprano
<steve+comp.lang.pyt...@pearwood.info> escribió:
On Sat, 28 May 2011 09:39:08 -0700, John Nagle wrote:
Python allows patching code while the code is executing.
Can you give an example of what you mean by this?
If I have a function:
def f(a, b):
c = a + b
d = c*3
return "hello world"*d
how would I patch this function while it is executing?
I think John Nagle was thinking about rebinding names:
def f(self, a, b):
while b>0:
b = g(b)
c = a + b
d = self.h(c*3)
return "hello world"*d
both g and self.h may change its meaning from one iteration to the next,
so a complete name lookup is required at each iteration. This is very
useful sometimes, but affects performance a lot.
--
Gabriel Genellina
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