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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: confused about the different built-in functions in Python
Date: Mon, 26 May 2014 22:00:03 -0400
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On 5/26/2014 4:32 PM, Marko Rauhamaa wrote:

> I stand corrected. I had thought the trampoline ("bound method object")
> was created once and for all.

Assuming that bound methods are immutable, this is an implementation 
detail, either way. However, it is common for a specific method to be 
called just once on a specific instance. If you have a mixed-case string 
Ss and want the lowercase version, ss = Ss.lower(), you keep ss around 
as long as needed. If the bound method is needed repeatedly, you can 
keep *that* around too.

stack = []
spush = stack.append
spop = stack.pop

for item in it:
   spush(item)
while stack and condition:
   p = process(spop)
...

-- 
Terry Jan Reedy