Use of async as a variable name breaks Paramiko in Python 3.7

[vEpiphyte]

After installing Paramiko 2.3.1 into a Python 3.7-rc docker container, attempting to import Paramiko fails.

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.7/site-packages/paramiko/__init__.py", line 31, in <module>
    from paramiko.transport import SecurityOptions, Transport
  File "/usr/local/lib/python3.7/site-packages/paramiko/transport.py", line 70, in <module>
    from paramiko.sftp_client import SFTPClient
  File "/usr/local/lib/python3.7/site-packages/paramiko/sftp_client.py", line 43, in <module>
    from paramiko.sftp_file import SFTPFile
  File "/usr/local/lib/python3.7/site-packages/paramiko/sftp_file.py", line 68
    self._close(async=True)
                    ^
SyntaxError: invalid syntax

According to https://www.python.org/dev/peps/pep-0492/#deprecation-plans async becomes a Python language keyword starting in Python 3.7.

Relates to vertexproject/synapse-docker-testimages#37

Similar issue encountered in neovim/pynvim#274

[bitprophet]

Well that makes me grumpy. Where's Python 4.0 when you need it? 🙃

Thank goodness, the only spots I see [^_]async[^_] are right around where you found it, and it's technically in a private API, so I can't feel too bad about renaming it. Will fix in a sec. Thank you for the report!

[vardhmanandroid2015]

Faced the same issue when upgraded docker client to latest one docker-3.7.0 on WIndow10
Traceback (most recent call last):
File "", line 1, in
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker_init_.py", line 2, in
from .api import APIClient
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\api_init_.py", line 2, in
from .client import APIClient
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\api\client.py", line 10, in
from .build import BuildApiMixin
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\api\build.py", line 6, in
from .. import auth
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\auth.py", line 9, in
from .utils import config
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\utils_init_.py", line 3, in
from .decorators import check_resource, minimum_version, update_headers
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\utils\decorators.py", line 4, in
from . import utils
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\utils\utils.py", line 13, in
from .. import tls
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\tls.py", line 5, in
from .transport import SSLAdapter
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\transport_init_.py", line 11, in
from .sshconn import SSHAdapter
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\docker\transport\sshconn.py", line 1, in
import paramiko
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko_init_.py", line 30, in
from paramiko.transport import SecurityOptions, Transport
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko\transport.py", line 66, in
from paramiko.sftp_client import SFTPClient
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko\sftp_client.py", line 41, in
from paramiko.sftp_file import SFTPFile
File "C:\Users\abhishek.jain\AppData\Local\Programs\Python\Python37\lib\site-packages\paramiko\sftp_file.py", line 66
self._close(async=True)
^
SyntaxError: invalid syntax

[vEpiphyte]

@vardhmanandroid2015 The https://github.com/docker/docker-py library 3.7.0 release only includes paramiko if you do a extras install specifying ssh. This is a problem with how you installed the library; not a problem with paramiko or docker-py.