sshfs: drop python 3.6

Author: efiop

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
 
       matrix:
         os: [ubuntu-18.04, macos-10.15]
-        pyv: ["3.6", "3.7", "3.8", "3.9", "3.10.0-rc.1"]
+        pyv: ["3.7", "3.8", "3.9", "3.10.0-rc.1"]
 
     steps:
     - uses: actions/checkout@v2

setup.cfg

@@ -17,7 +17,6 @@ classifiers =
 install_requires =
     fsspec>=2021.8.1
     asyncssh>=2.7.1,<2.9
-    async_exit_stack==1.0.1; python_version < "3.7"
 packages = find:
 
 [options.extras_require]

sshfs/compat.py

@@ -1,10 +1,8 @@
 import asyncio
-from contextlib import suppress
+from contextlib import AsyncExitStack, suppress
 
 from asyncssh.misc import ChannelOpenError
 
-from sshfs.compat import AsyncExitStack
-
 MAX_TIMEOUT = 60 * 60 * 3
 
 

sshfs/pools/base.py

@@ -1,6 +1,6 @@
 import asyncio
+from contextlib import asynccontextmanager
 
-from sshfs.compat import asynccontextmanager
 from sshfs.pools.base import BaseSFTPChannelPool
 
 

sshfs/pools/hard.py

@@ -1,7 +1,7 @@
 import heapq
 from collections import Counter
+from contextlib import asynccontextmanager
 
-from sshfs.compat import asynccontextmanager
 from sshfs.pools.base import BaseSFTPChannelPool
 
 

sshfs/pools/soft.py

@@ -4,7 +4,7 @@
 import stat
 import threading
 import weakref
-from contextlib import suppress
+from contextlib import AsyncExitStack, suppress
 from datetime import datetime
 
 import asyncssh
@@ -17,7 +17,6 @@
     sync_wrapper,
 )
 
-from sshfs.compat import AsyncExitStack
 from sshfs.file import SSHFile
 from sshfs.pools import SFTPSoftChannelPool
 from sshfs.utils import (