ImportError: cannot import name keys about fastecdsa HOT 5 CLOSED

from fastecdsa import curve, ecdsa
from hashlib import sha384

m = "a message to sign via ECDSA"  # some message

''' use default curve and hash function (P256 and SHA2) '''
private_key, public_key = ecdsa.gen_keypair()
# standard signature, returns two integers
r, s = ecdsa.sign(m, private_key)
# should return True as the signature we just generated is valid.
valid = ecdsa.verify((r, s), m, public_key)


''' specify a different curve to use with ECDSA '''
private_key, public_key = ecdsa.gen_keypair(curve=curve.P224)
r, s = ecdsa.sign(m, private_key, curve=curve.P224)
valid = ecdsa.verify((r, s), m, public_key, curve=curve.P224)

''' specify a different hash function to use with ECDSA '''
private_key, public_key = ecdsa.gen_keypair()
r, s = ecdsa.sign(m, private_key, hashfunc=sha384)
valid = ecdsa.verify((r, s), m, public_key, hashfunc=sha384)