cryptography - Import issue with Python six library -

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inside virtualenv have lot of libraries use six dependency paramiko , python-keystoneclient raise import error:

error:paramiko.transport:unknown exception: cannot import name urllib_parse error:paramiko.transport:traceback (most recent call last): error:paramiko.transport:  file "/.../lib/python2.7/site-packages/paramiko/transport.py", line 1772, in run error:paramiko.transport:    self.kex_engine.parse_next(ptype, m) error:paramiko.transport:  file "/.../lib/python2.7/site-packages/paramiko/kex_group1.py", line 75, in parse_next error:paramiko.transport:    return self._parse_kexdh_reply(m) error:paramiko.transport:  file "/.../lib/python2.7/site-packages/paramiko/kex_group1.py", line 111, in _parse_kexdh_reply error:paramiko.transport:    self.transport._verify_key(host_key, sig) error:paramiko.transport:  file "/.../lib/python2.7/site-packages/paramiko/transport.py", line 1617, in _verify_key error:paramiko.transport:    key = self._key_info[self.host_key_type](message(host_key)) error:paramiko.transport:  file "/.../lib/python2.7/site-packages/paramiko/rsakey.py", line 58, in __init__ error:paramiko.transport:    ).public_key(default_backend()) error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/hazmat/backends/__init__.py", line 35, in default_backend error:paramiko.transport:    _default_backend = multibackend(_available_backends()) error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/hazmat/backends/__init__.py", line 22, in _available_backends error:paramiko.transport:    "cryptography.backends" error:paramiko.transport:  file "/.../lib/python2.7/site-packages/pkg_resources/__init__.py", line 2235, in resolve error:paramiko.transport:    module = __import__(self.module_name, fromlist=['__name__'], level=0) error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/hazmat/backends/openssl/__init__.py", line 7, in <module> error:paramiko.transport:    cryptography.hazmat.backends.openssl.backend import backend error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 15, in <module> error:paramiko.transport:    cryptography import utils, x509 error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/x509/__init__.py", line 7, in <module> error:paramiko.transport:    cryptography.x509.base import ( error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/x509/base.py", line 15, in <module> error:paramiko.transport:    cryptography.x509.extensions import extension, extensiontype error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/x509/extensions.py", line 22, in <module> error:paramiko.transport:    cryptography.x509.general_name import generalname, ipaddress, othername error:paramiko.transport:  file "/.../lib/python2.7/site-packages/cryptography/x509/general_name.py", line 15, in <module> error:paramiko.transport:    six.moves import urllib_parse error:paramiko.transport:importerror: cannot import name urllib_parse

i went through internet find way fix problem without solving it.

i tried these steps:

  • re-install libraries involved
  • re-install virtualenv
  • tried several older 6 versions

these versions of libraries:

  • cryptography==1.4
  • keystoneauth1==2.8.0
  • paramiko==2.0.1
  • python-keystoneclient==3.1.0
  • python-swiftclient==3.0.0
  • six==1.10.0
  • urllib3==1.16

and got same issue these python versions:

  • python 2.7.11+ --> ubuntu 16.04
  • python 2.7.10 --> ubuntu 15.10

if try

from six.moves import urllib_parse

inside python shell, works correctly.

do have idea? in advance!

try downgrade paramiko 1.16.0. solution in case. luck!


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