Function to prune dictionary keys not working

[Steve Holden]

Girish Sahani wrote:
> hi ppl,
>  Here is a simple function to remove those keys of a dictionary whose
> values are less than some specified value. But it isnt working. Please
> help.
> 
Besides all the good advice you've been given about not expecting 
string/float comparisons to be meaningful, remember too that both your 
function's result and the dict's .keys() method return *lists*.

  >>> [1, 2] == [2, 1]
False
  >>>

Easiest would be to convert both lists to sets and use

     if set(prune(d,cp)) == set(d.keys()):

You could, instead, sort them before comparison, but that's only a win 
if you need them sorted elsewhere.

regards
  Steve
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