How to use the lmdb.Cursor.iternext_dup function in lmdb
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vertexproject / synapse / synapse / lib / lmdbslab.py View on Github 
def set_key(self, lkey):
if not self.curs.set_key(lkey):
return False
# set_key for a scan is only logical if it's a dup scan
if self.dupsort:
self.iterfunc = functools.partial(lmdb.Cursor.iternext_dup, keys=True)
else:
self.iterfunc = lmdb.Cursor.iternext
self.genr = self.iterfunc(self.curs)
self.atitem = next(self.genr)
return Truelmdb
Universal Python binding for the LMDB 'Lightning' Database
