[pylint] searx/network/network.py & add global (NETWORKS)

No functional change!

- fix messages from pylint
- add ``global NETWORKS``

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/network/network.py

@@ -1,4 +1,7 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
+# lint: pylint
+# pylint: disable=global-statement
+# pylint: disable=missing-module-docstring, missing-class-docstring, missing-function-docstring
 
 import atexit
 import asyncio
@@ -39,7 +42,9 @@ class Network:
                  'local_addresses', 'proxies', 'max_redirects', 'retries', 'retry_on_http_error',
                  '_local_addresses_cycle', '_proxies_cycle', '_clients')
 
-    def __init__(self,
+    def __init__(
+            # pylint: disable=too-many-arguments
+            self,
             enable_http=True,
             verify=True,
             enable_http2=False,
@@ -51,6 +56,7 @@ class Network:
             retries=0,
             retry_on_http_error=None,
             max_redirects=30 ):
+
         self.enable_http = enable_http
         self.verify = verify
         self.enable_http2 = enable_http2
@@ -81,7 +87,7 @@ class Network:
         local_addresses = self.local_addresses
         if not local_addresses:
             return
-        elif isinstance(local_addresses, str):
+        if isinstance(local_addresses, str):
             local_addresses = [local_addresses]
         for address in local_addresses:
             yield address
@@ -119,6 +125,7 @@ class Network:
         for pattern, proxy_urls in self.iter_proxies():
             proxy_settings[pattern] = cycle(proxy_urls)
         while True:
+            # pylint: disable=stop-iteration-return
             yield tuple((pattern, next(proxy_url_cycle)) for pattern, proxy_url_cycle in proxy_settings.items())
 
     def get_client(self, verify=None, max_redirects=None):
@@ -158,6 +165,7 @@ class Network:
         return kwargs_clients
 
     def is_valid_respones(self, response):
+        # pylint: disable=too-many-boolean-expressions
         if (self.retry_on_http_error is True and 400 <= response.status_code <= 599) \
            or (isinstance(self.retry_on_http_error, list) and response.status_code in self.retry_on_http_error) \
            or (isinstance(self.retry_on_http_error, int) and response.status_code == self.retry_on_http_error):
@@ -194,6 +202,7 @@ class Network:
 
     @classmethod
     async def aclose_all(cls):
+        global NETWORKS
         await asyncio.gather(*[network.aclose() for network in NETWORKS.values()], return_exceptions=False)
 
 
@@ -203,8 +212,10 @@ def get_network(name=None):
 
 
 def initialize(settings_engines=None, settings_outgoing=None):
+    # pylint: disable=import-outside-toplevel)
     from searx.engines import engines
     from searx import settings
+    # pylint: enable=import-outside-toplevel)
 
     global NETWORKS
 
@@ -212,7 +223,7 @@ def initialize(settings_engines=None, settings_outgoing=None):
     settings_outgoing = settings_outgoing or settings.get('outgoing')
 
     # default parameters for AsyncHTTPTransport
-    # see https://github.com/encode/httpx/blob/e05a5372eb6172287458b37447c30f650047e1b8/httpx/_transports/default.py#L108-L121  # noqa
+    # see https://github.com/encode/httpx/blob/e05a5372eb6172287458b37447c30f650047e1b8/httpx/_transports/default.py#L108-L121  # pylint: disable=line-too-long
     default_params = {
         'enable_http': False,
         'verify': True,
@@ -290,6 +301,7 @@ def done():
     Note: since Network.aclose has to be async, it is not possible to call this method on Network.__del__
     So Network.aclose is called here using atexit.register
     """
+    global NETWORKS
     try:
         loop = get_loop()
         if loop: