pywallet os error

Traceback (most recent call last): File "create_eth_wallet.py", line 1, in from pywallet import wallet File "/usr/local/lib/python2.7/dist-packages/pywallet/wallet.py", line 5, in from .utils import ( File "/usr/local/lib/python2.7/dist-packages/pywallet/utils/init.py", line 5, in from .ethereum import ( File "/usr/local/lib/python2.7/dist-packages/pywallet/utils/ethereum.py", line 20, in from two1.bitcoin.utils import bytes_to_str File "/usr/local/lib/python2.7/dist-packages/two1/bitcoin/init.py", line 19, in from .block import BlockHeader File "/usr/local/lib/python2.7/dist-packages/two1/bitcoin/block.py", line 7, in from two1.bitcoin.txn import Transaction File "/usr/local/lib/python2.7/dist-packages/two1/bitcoin/txn.py", line 7, in from two1.bitcoin import crypto File "/usr/local/lib/python2.7/dist-packages/two1/bitcoin/crypto.py", line 18, in bitcoin_curve = secp256k1() File "/usr/local/lib/python2.7/dist-packages/two1/crypto/ecdsa_openssl.py", line 449, in init super().init(hashlib.sha256) TypeError: super() takes at least 1 argument (0 given) Exception AttributeError: "'secp256k1' object has no attribute '_lc'" in <bound method secp256k1.del of <two1.crypto.ecdsa_openssl.secp256k1 object at 0x7fb4ecabd610>> ignored