On 02/25/2011 10:44 AM, Alain Ketterlin wrote:
Seldon<sel...@katamail.it> writes:
I have to convert integer ranges expressed in a popular "compact"
notation (e.g. 2, 5-7, 20-22, 41) to a the actual set of numbers (i.e.
2,5,7,20,21,22,41).
What form does the input have? Are they strings, or some other
representation?
Strings
What kind of result do you need? An explicit list? A generator?
A list.
Here is a naive solution where the input is a list of strings and the
result a generator:
def values(l):
for item in l:
bounds = item.split('-')
if len(bounds) == 1:
yield int(bounds[0])
elif len(bounds) == 2:
for v in range(int(bounds[0]),1+int(bounds[1])):
yield v
else:
pass # ignore, or throw, or...
# Use as in:
for x in values(["1","2-3","4-10"]):
print x
Ok, tnx.
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