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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_all_accounts(self):
 """iterates through trie to and yields non-blank leafs as accounts."""

        for address_hash, rlpdata in self.secure_trie.trie.iter_branch():
            if rlpdata != trie.BLANK_NODE:
                yield rlp.decode(rlpdata, Account, db=self.db, addr=address_hash)