Python code for 2.5 and 2.4?

[Joseph Turian]

I was given code that was written for python 2.5, and uses simple
functions like 'all' which are not present in 2.4

I want to make the code 2.4 compatible. What is the best way to do
this?
If I define function 'all', then won't I break 2.5 compatability?

Thanks,
  Joseph