Cacher is the code snippet organizer for pro developers

import blocksci

chain = blocksci.Blockchain("/home/gareth/blocksci/zcash-data")

migration_tx = 0

for blk in chain[500000:571501]:
    for tx in blk:
        if (tx.is_saplingshielded and tx.is_sproutshielded):
            print(tx.hash)
            migration_tx += 1

print("Number of migration transactions is {}".format(migration_tx))