python - Python 6 库的导入问题

Question

在我的 virtualenv 中，我有很多使用 six 作为依赖项的库，但是 paramiko 和 python-keystoneclient 引发了这个导入错误:

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:    from 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:    from cryptography import utils, x509
ERROR:paramiko.transport:  File "/.../lib/python2.7/site-packages/cryptography/x509/__init__.py", line 7, in <module>
ERROR:paramiko.transport:    from cryptography.x509.base import (
ERROR:paramiko.transport:  File "/.../lib/python2.7/site-packages/cryptography/x509/base.py", line 15, in <module>
ERROR:paramiko.transport:    from 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:    from 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:    from six.moves import urllib_parse
ERROR:paramiko.transport:ImportError: cannot import name urllib_parse

我通过互联网找到了解决这个问题的方法，但没有解决它。

我已经尝试过这些步骤:

• 重新安装所有涉及的库
• 重新安装虚拟环境
• 尝试了几个较早的 6 个版本

这些是库的版本:

• 密码学==1.4
• keystoneauth1==2.8.0
• paramiko==2.0.1
• python-keystoneclient==3.1.0
• python-swiftclient==3.0.0
• 六==1.10.0
• urllib3==1.16

我在这些 Python 版本中遇到了同样的问题:

• Python 2.7.11+ --> Ubuntu 16.04
• Python 2.7.10 --> Ubuntu 15.10

如果我尝试

from six.moves import urllib_parse

在 Python shell 中，它可以正常工作。

你有什么想法吗？提前致谢!

Answer 1

尝试将 paramiko 降级到 1.16.0。就我而言，这是一个解决方案。祝你好运!