I used this quickndirty way, any good idea to solve this problem?
def miter(iterable):
cache = set()
while True:
try:
for x in iterable:
if x not in cache:
cache.add(x)
yield x
break
except RuntimeError, e:
# Not sure if there were any other RuntimeError
if 'changed size during iteration' in e.message:
continue
raise
s = set([1, 2, 3, 5, 6, 7])
for x in miter(s):
start, stop = x, x+1
while start-1 in s:
start -= 1
while stop in s:
stop += 1
for i in range(start, stop):
s.discard(i)
print '[%d:%d]' % (start, stop)
d = {'foo':1}
for x in miter(d):
if x == 'foo':
d['bar']=1
print x
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