Traceback (most recent call last):


 "<stdin>", line 1, in <module>
ImportError: cannot import name 'InvalidHandshake'

Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "/usr/lib/python2.7/site-packages/paramiko/__init__.py", line 22, in <module>

from paramiko.transport import SecurityOptions, Transport


 "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 57, in <module>

from paramiko.ed25519key import Ed25519Key


 "/usr/lib/python2.7/site-packages/paramiko/ed25519key.py", line 22, in <module>

import nacl.signing


 "/usr/lib/python2.7/site-packages/nacl/signing.py", line 19, in <module>

import nacl.bindings


 "/usr/lib/python2.7/site-packages/nacl/bindings/__init__.py", line 17, in <module>

from nacl.bindings.crypto_box import (


 "/usr/lib/python2.7/site-packages/nacl/bindings/crypto_box.py", line 18, in <module>

from nacl._sodium import ffi, lib
ImportError: No such file or directory
