updated to use btclib
#!/usr/bin/env python3
-from ellipticcurves import secp256k1 as ec
from hashlib import sha256
-from numbertheory import mod_inv
+from btclib.ellipticcurves import secp256k1 as ec
+from btclib.numbertheory import mod_inv
print("\n*** EC:")
print(ec)
