Linux 使用pysftp设置到服务器的测试连接

我正在尝试建立到sftp服务器的测试连接。（如中所示）。我通过终端与服务器建立第一次连接，从服务器获得了密钥。这是完美的。但是，如果我运行python脚本：

import pysftp 
sftp = pysftp.Connection('test.rebex.net', username='demo', password='password') 
data = s.listdir() 
sftp.close() 
for i in data: 
    print(i)

我收到以下错误消息：

> Traceback (most recent call last):   File "/home/pi/Documents/Python
> Projects/ftp_connection.py", line 24, in <module>
>     sftp = pysftp.Connection('test.rebex.net', username='demo', password='password')   File
> "/usr/local/lib/python3.4/dist-packages/pysftp-0.2.9-py3.4.egg/pysftp/__init__.py",
> line 116, in __init__
>     self._cnopts = cnopts or CnOpts()   File "/usr/local/lib/python3.4/dist-packages/pysftp-0.2.9-py3.4.egg/pysftp/__init__.py",
> line 54, in __init__
>     self.hostkeys.load(knownhosts)   File "/usr/local/lib/python3.4/dist-packages/paramiko-2.1.2-py3.4.egg/paramiko/hostkeys.py",
> line 101, in load
>     e = HostKeyEntry.from_line(line, lineno)   File "/usr/local/lib/python3.4/dist-packages/paramiko-2.1.2-py3.4.egg/paramiko/hostkeys.py",
> line 335, in from_line
>     key = ECDSAKey(data=decodebytes(key), validate_point=False)   File "/usr/local/lib/python3.4/dist-packages/paramiko-2.1.2-py3.4.egg/paramiko/ecdsakey.py",
> line 138, in __init__
>     self.verifying_key = numbers.public_key(backend=default_backend())   File
> "/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/__init__.py",
> line 74, in default_backend
>     _default_backend = MultiBackend(_available_backends())   File "/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/__init__.py",
> line 31, in _available_backends
>     "cryptography.backends"   File "/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/__init__.py",
> line 30, in <listcomp>
>     for ep in pkg_resources.iter_entry_points(   File "/usr/lib/python3/dist-packages/pkg_resources.py", line 2190, in load
>     ['__name__'])   File "/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/openssl/__init__.py",
> line 7, in <module>
>     from cryptography.hazmat.backends.openssl.backend import backend   File
> "/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/openssl/backend.py", line 49, in <module>
>     from cryptography.hazmat.bindings.openssl import binding   File "/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/bindings/openssl/binding.py", line 12, in <module>
>     from cryptography.hazmat.bindings._openssl import ffi, lib ImportError: libssl.so.1.1: cannot open shared object file: No such
> file or directory

>回溯（最后一次调用）：文件“/home/pi/Documents/Python
>项目/ftp_connection.py”，第24行，在
>sftp=pysftp.Connection（'test.rebex.net'，username='demo'，password='password'）文件
>“/usr/local/lib/python3.4/dist-packages/pysftp-0.2.9-py3.4.egg/pysftp/_______.py”，
>第116行，in_uuuinit__
>self.\u cnopts=cnopts或cnopts（）文件“/usr/local/lib/python3.4/dist packages/pysftp-0.2.9-py3.4.egg/pysftp/uuu init_uuu.py”，
>第54行，in_uuuinit__
>self.hostkeys.load（knownhosts）文件“/usr/local/lib/python3.4/dist packages/paramiko-2.1.2-py3.4.egg/paramiko/hostkeys.py”，
>第101行，已加载
>e=HostKeyEntry.from_line（line，lineno）文件“/usr/local/lib/python3.4/dist packages/paramiko-2.1.2-py3.4.egg/paramiko/hostkeys.py”，
>第335行，从_行输入
>key=ECDSAKey（data=decodebytes（key），validate_point=False）文件“/usr/local/lib/python3.4/dist packages/paramiko-2.1.2-py3.4.egg/paramiko/ECDSAKey.py”，
>第138行，in_uuuinit__
>self.verifying_key=numbers.public_key（backend=default_backend（））文件
>“/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/________.py”，
>第74行，默认为_后端
>_default_backend=multi-backend（_available_backends（））文件/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/uuu init\uuu.py“，
>第31行，输入可用的后端
>“cryptography.backends”文件“/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/__;init__u__;.py”，
>第30行，在
>对于pkg_resources.iter_入口点（文件“/usr/lib/python3/dist packages/pkg_resources.py”，第2190行，加载中的ep
>[''名称]/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/openssl/u init_u.py“，
>第7行，在
>从cryptography.hazmat.backends.openssl.backend导入后端文件
>“/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/backends/openssl/backend.py”，中第49行
>来自cryptography.hazmat.bindings.openssl导入绑定文件“/usr/local/lib/python3.4/dist-packages/cryptography-1.8.1-py3.4-linux-armv7l.egg/cryptography/hazmat/bindings/openssl/binding.py”，第12行，in
>来自cryptography.hazmat.bindings.\u openssl导入ffi，lib ImportError:libssl.so.1.1:无法打开共享对象文件：无此类文件
>文件或目录

---

我检查了/etc/ld.so.conf.d/libc.conf文件以查看搜索路径，即/usr/local/lib。在上述路径中，我可以找到libssl.so.1.1文件。有没有人对如何解释错误信息有什么建议，或者知道我哪里出错了？非常感谢。

别让我打扰你。解决方案很简单： 结果我不得不跑：

sudo ldconfig

正如先前在中所建议的那样