Drop Python 3.6 support (#3133)

.github/workflows/integration.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-20.04]
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9]
     steps:
     - name: Checkout
       uses: actions/checkout@v2

searx/network/__init__.py

@@ -4,6 +4,7 @@ import asyncio
 import threading
 import concurrent.futures
 from time import time
+from queue import SimpleQueue
 
 import httpx
 import h2.exceptions
@@ -12,29 +13,6 @@ from .network import get_network, initialize, check_network_configuration
 from .client import get_loop
 from .raise_for_httperror import raise_for_httperror
 
-# queue.SimpleQueue: Support Python 3.6
-try:
-    from queue import SimpleQueue
-except ImportError:
-    from queue import Empty
-    from collections import deque
-
-    class SimpleQueue:
-        """Minimal backport of queue.SimpleQueue"""
-
-        def __init__(self):
-            self._queue = deque()
-            self._count = threading.Semaphore(0)
-
-        def put(self, item):
-            self._queue.append(item)
-            self._count.release()
-
-        def get(self):
-            if not self._count.acquire(True):
-                raise Empty
-            return self._queue.popleft()
-
 
 THREADLOCAL = threading.local()
 

searx/network/client.py

@@ -3,6 +3,7 @@
 import asyncio
 import logging
 import threading
+import uvloop
 
 import httpcore
 import httpx
@@ -17,14 +18,6 @@ import python_socks._errors
 
 from searx import logger
 
-# Optional uvloop (support Python 3.6)
-try:
-    import uvloop
-except ImportError:
-    pass
-else:
-    uvloop.install()
-
 
 logger = logger.getChild('searx.http.client')
 LOOP = None