def from_pem(cls, pem):
"""
:param pem: A private key previously encoded as PEM.
:type pem: ``bytes``
:rtype: :class:`~bitsv.PrivateKeyTestnet`
"""
return PrivateKeyTestnet(ECPrivateKey.from_pem(pem))
def from_pem(cls, pem, network='main'):
"""
:param pem: A private key previously encoded as PEM.
:type pem: ``bytes``
:param network: 'main', 'test' or 'stn'
:type network: ``str``
:rtype: :class:`~bitsv.PrivateKey`
"""
return PrivateKey(ECPrivateKey.from_pem(pem), network=network)