def iterkeys(prefix='', strip_prefix=False):
for i in xrange(count()):
key = key_by_index(i)
if key.startswith(prefix):
if strip_prefix:
key = key[len(prefix):]
yield key
def iterkeys(prefix='', strip_prefix=False):
decode = lambda s: s
if isinstance(prefix, six.text_type):
prefix = prefix.encode('utf-8')
decode = lambda s: s.decode('utf-8')
for i in six.moves.range(count()):
key = key_by_index(i)
if key.startswith(prefix):
if strip_prefix:
key = key[len(prefix):]
yield decode(key)