Girish Sahani a écrit :
> 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.
"is not working" is the worst possible description of a problem.
> def prune(d,cp):
> l = []
> for rule,value in d.iteritems():
> #print value
> if value >= cp:
> l.append(rule)
> return l
This doesn't remove anything from the dict - it returns a list of keys
for which values are >= cp value. FWIW, a simple expression is enough to
do this:
[k for k, v in d.items() if v >= cp]
The algorithm for what you described would be:
def prune(dic, cmp):
for k, v in dic.items():
if v < cmp:
del dic[k]
>>>>d = {'be=>c': '1.00', 'c=>da': '0.50', 'ea=>b': '0.33', 'be=>d':
>
> '0.50', 'c=>ba': '0.33', 'bd=>a': '1.00', 'a=>cb': '0.33', 'ea=>c':
> '0.67', 'a=>cd': '0.50', 'e=>ac': '0.40', 'e=>ab': '0.20', 'c=>bd':
> '0.33', 'e=>cb': '0.40', 'ed=>b': '0.25', 'ed=>c': '0.50'}
>
>>>>cp = 0.5
You are comparing floats with strings...
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