Removed dependency from prctl.

Also, black'd and LINT-fixed some files that hadn't been touched in a
while.

platypush/__init__.py

@@ -23,7 +23,7 @@ from .message.event import Event
 from .message.event.application import ApplicationStartedEvent
 from .message.request import Request
 from .message.response import Response
-from .utils import set_thread_name, get_enabled_plugins
+from .utils import get_enabled_plugins
 
 __author__ = 'Fabio Manganiello <fabio@manganiello.tech>'
 __version__ = '0.50.3'
@@ -252,7 +252,6 @@ class Daemon:
         if not self.no_capture_stderr:
             sys.stderr = Logger(log.warning)
 
-        set_thread_name('platypush')
         log.info('---- Starting platypush v.%s', __version__)
 
         # Initialize the backends and link them to the bus

platypush/backend/__init__.py

@@ -18,7 +18,6 @@ from platypush.utils import (
     set_timeout,
     clear_timeout,
     get_redis_queue_name_by_message,
-    set_thread_name,
     get_backend_name_by_class,
 )
 
@@ -81,7 +80,7 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         self._request_context = kwargs['_req_ctx'] if '_req_ctx' in kwargs else None
 
         if 'logging' in kwargs:
-            self.logger.setLevel(getattr(logging, kwargs.get('logging').upper()))
+            self.logger.setLevel(getattr(logging, kwargs['logging'].upper()))
 
     def on_message(self, msg):
         """
@@ -95,21 +94,23 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         """
 
         msg = Message.build(msg)
+        if msg is None:
+            return
 
         if not getattr(msg, 'target', None) or msg.target != self.device_id:
             return  # Not for me
 
         self.logger.debug(
-            'Message received on the {} backend: {}'.format(
+            'Message received on the %s backend: %s', self.__class__.__name__, msg
-                self.__class__.__name__, msg
-            )
         )
 
         if self._is_expected_response(msg):
             # Expected response, trigger the response handler
             clear_timeout()
+            if self._request_context:
                 # pylint: disable=unsubscriptable-object
                 self._request_context['on_response'](msg)
+
             self.stop()
             return
 
@@ -117,8 +118,10 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         self.bus.post(msg)
 
     def _is_expected_response(self, msg):
-        """Internal only - returns true if we are expecting for a response
+        """
-        and msg is that response"""
+        Internal only - returns true if we are expecting for a response and msg
+        is that response.
+        """
 
         # pylint: disable=unsubscriptable-object
         return (
@@ -131,12 +134,12 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         config_name = (
             'backend.' + self.__class__.__name__.split('Backend', maxsplit=1)[0].lower()
         )
-        return Config.get(config_name)
+        return Config.get(config_name) or {}
 
     def _setup_response_handler(self, request, on_response, response_timeout):
         def _timeout_hndl():
             raise RuntimeError(
-                'Timed out while waiting for a response from {}'.format(request.target)
+                f'Timed out while waiting for a response from {request.target}'
             )
 
         req_ctx = {
@@ -177,7 +180,7 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         request,
         on_response=None,
         response_timeout=_default_response_timeout,
-        **kwargs
+        **kwargs,
     ):
         """
         Send a request message on the backend.
@@ -237,9 +240,10 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         except KeyError:
             self.logger.warning(
                 (
-                    "Backend {} does not implement send_message "
+                    "Backend %s does not implement send_message "
                     "and the fallback Redis backend isn't configured"
-                ).format(self.__class__.__name__)
+                ),
+                self.__class__.__name__,
             )
             return
 
@@ -248,7 +252,6 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
     def run(self):
         """Starts the backend thread. To be implemented in the derived classes if the loop method isn't defined."""
         self.thread_id = get_ident()
-        set_thread_name(self._thread_name)
         if not callable(self.loop):
             return
 
@@ -272,21 +275,19 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
                                 time.sleep(5)
             except Exception as e:
                 self.logger.error(
-                    '{} initialization error: {}'.format(
+                    '%s initialization error: %s', self.__class__.__name__, e
-                        self.__class__.__name__, str(e)
-                    )
                 )
                 self.logger.exception(e)
                 time.sleep(self.poll_seconds or 5)
 
     def __enter__(self):
         """Invoked when the backend is initialized, if the main logic is within a ``loop()`` function"""
-        self.logger.info('Initialized backend {}'.format(self.__class__.__name__))
+        self.logger.info('Initialized backend %s', self.__class__.__name__)
 
-    def __exit__(self, exc_type, exc_val, exc_tb):
+    def __exit__(self, *_, **__):
         """Invoked when the backend is terminated, if the main logic is within a ``loop()`` function"""
         self.on_stop()
-        self.logger.info('Terminated backend {}'.format(self.__class__.__name__))
+        self.logger.info('Terminated backend %s', self.__class__.__name__)
 
     def on_stop(self):
         """Callback invoked when the process stops"""
@@ -324,9 +325,14 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         return redis
 
     def get_message_response(self, msg):
+        queue = get_redis_queue_name_by_message(msg)
+        if not queue:
+            self.logger.warning('No response queue configured for the message')
+            return None
+
         try:
             redis = self._get_redis()
-            response = redis.blpop(get_redis_queue_name_by_message(msg), timeout=60)
+            response = redis.blpop(queue, timeout=60)
             if response and len(response) > 1:
                 response = Message.build(response[1])
             else:
@@ -334,9 +340,9 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
 
             return response
         except Exception as e:
-            self.logger.error(
+            self.logger.error('Error while processing response to %s: %s', msg, e)
-                'Error while processing response to {}: {}'.format(msg, str(e))
+
-            )
+        return None
 
     @staticmethod
     def _get_ip() -> str:
@@ -395,18 +401,9 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
         }
 
         name = name or re.sub(r'Backend$', '', self.__class__.__name__).lower()
-        srv_type = srv_type or '_platypush-{name}._{proto}.local.'.format(
+        srv_type = srv_type or f'_platypush-{name}._{"udp" if udp else "tcp"}.local.'
-            name=name, proto='udp' if udp else 'tcp'
+        srv_name = srv_name or f'{self.device_id}.{srv_type}'
-        )
+        srv_port = port if port else getattr(self, 'port', None)
-        srv_name = srv_name or '{host}.{type}'.format(
-            host=self.device_id, type=srv_type
-        )
-
-        if port:
-            srv_port = port
-        else:
-            srv_port = self.port if hasattr(self, 'port') else None
-
         self.zeroconf_info = ServiceInfo(
             srv_type,
             srv_name,
@@ -439,9 +436,10 @@ class Backend(Thread, EventGenerator, ExtensionWithManifest):
                 self.zeroconf.unregister_service(self.zeroconf_info)
             except Exception as e:
                 self.logger.warning(
-                    'Could not register Zeroconf service {}: {}: {}'.format(
+                    'Could not register Zeroconf service %s: %s: %s',
-                        self.zeroconf_info.name, type(e).__name__, str(e)
+                    self.zeroconf_info.name,
-                    )
+                    type(e).__name__,
+                    e,
                 )
 
             if self.zeroconf:

platypush/backend/google/pubsub/__init__.py

@@ -5,7 +5,6 @@ from typing import Optional, List
 from platypush.backend import Backend
 from platypush.context import get_plugin
 from platypush.message.event.google.pubsub import GooglePubsubMessageEvent
-from platypush.utils import set_thread_name
 
 
 class GooglePubsubBackend(Backend):
@@ -25,7 +24,9 @@ class GooglePubsubBackend(Backend):
 
     """
 
-    def __init__(self, topics: List[str], credentials_file: Optional[str] = None, *args, **kwargs):
+    def __init__(
+        self, topics: List[str], credentials_file: Optional[str] = None, *args, **kwargs
+    ):
         """
         :param topics: List of topics to subscribe. You can either specify the full topic name in the format
             ``projects/<project_id>/topics/<topic_name>``, where ``<project_id>`` must be the ID of your
@@ -35,7 +36,7 @@ class GooglePubsubBackend(Backend):
             ``google.pubsub`` plugin or ``~/.credentials/platypush/google/pubsub.json``).
         """
 
-        super().__init__(*args, **kwargs)
+        super().__init__(*args, name='GooglePubSub', **kwargs)
         self.topics = topics
 
         if credentials_file:
@@ -46,7 +47,9 @@ class GooglePubsubBackend(Backend):
 
     @staticmethod
     def _get_plugin():
-        return get_plugin('google.pubsub')
+        plugin = get_plugin('google.pubsub')
+        assert plugin, 'google.pubsub plugin not enabled'
+        return plugin
 
     def _message_callback(self, topic):
         def callback(msg):
@@ -54,7 +57,7 @@ class GooglePubsubBackend(Backend):
             try:
                 data = json.loads(data)
             except Exception as e:
-                self.logger.debug('Not a valid JSON: {}: {}'.format(data, str(e)))
+                self.logger.debug('Not a valid JSON: %s: %s', data, e)
 
             msg.ack()
             self.bus.post(GooglePubsubMessageEvent(topic=topic, msg=data))
@@ -64,20 +67,23 @@ class GooglePubsubBackend(Backend):
     def run(self):
         # noinspection PyPackageRequirements
         from google.cloud import pubsub_v1
+
         # noinspection PyPackageRequirements
         from google.api_core.exceptions import AlreadyExists
 
         super().run()
-        set_thread_name('GooglePubSub')
         plugin = self._get_plugin()
         project_id = plugin.get_project_id()
         credentials = plugin.get_credentials(plugin.subscriber_audience)
         subscriber = pubsub_v1.SubscriberClient(credentials=credentials)
 
         for topic in self.topics:
-            if not topic.startswith('projects/{}/topics/'.format(project_id)):
+            prefix = f'projects/{project_id}/topics/'
-                topic = 'projects/{}/topics/{}'.format(project_id, topic)
+            if not topic.startswith(prefix):
-            subscription_name = '/'.join([*topic.split('/')[:2], 'subscriptions', topic.split('/')[-1]])
+                topic = f'{prefix}{topic}'
+            subscription_name = '/'.join(
+                [*topic.split('/')[:2], 'subscriptions', topic.split('/')[-1]]
+            )
 
             try:
                 subscriber.create_subscription(name=subscription_name, topic=topic)

platypush/backend/http/request/__init__.py

@@ -1,28 +1,36 @@
 import logging
 import re
-import requests
+from threading import Thread
 import time
 
+import requests
 from frozendict import frozendict
-from threading import Thread
 
 from platypush.message.event.http import HttpEvent
-from platypush.utils import set_thread_name
 
 
-class HttpRequest(object):
+class HttpRequest:
+    """
+    Backend used for polling HTTP resources.
+    """
+
     poll_seconds = 60
     timeout = 5
 
-    class HttpRequestArguments(object):
+    class HttpRequestArguments:
-        def __init__(self, url, method='get', *args, **kwargs):
+        """
+        Models the properties of an HTTP request.
+        """
+
+        def __init__(self, url, *args, method='get', **kwargs):
             self.method = method.lower()
             self.url = url
             self.args = args
             self.kwargs = kwargs
 
-    def __init__(self, args, bus=None, poll_seconds=None, timeout=None,
+    def __init__(
-                 skip_first_call=True, **kwargs):
+        self, args, bus=None, poll_seconds=None, timeout=None, skip_first_call=True, **_
+    ):
         super().__init__()
 
         self.poll_seconds = poll_seconds or self.poll_seconds
@@ -43,12 +51,13 @@ class HttpRequest(object):
             self.args.kwargs['timeout'] = self.timeout
 
         self.request_args = {
-            'method': self.args.method, 'url': self.args.url, **self.args.kwargs
+            'method': self.args.method,
+            'url': self.args.url,
+            **self.args.kwargs,
         }
 
     def execute(self):
         def _thread_func():
-            set_thread_name('HttpPoll')
             is_first_call = self.last_request_timestamp == 0
             self.last_request_timestamp = time.time()
 
@@ -63,30 +72,45 @@ class HttpRequest(object):
                 else:
                     event = HttpEvent(dict(self), new_items)
 
-                if new_items and self.bus:
+                if (
-                    if not self.skip_first_call or (
+                    new_items
-                            self.skip_first_call and not is_first_call):
+                    and self.bus
+                    and (
+                        not self.skip_first_call
+                        or (self.skip_first_call and not is_first_call)
+                    )
+                ):
                     self.bus.post(event)
 
                 response.raise_for_status()
             except Exception as e:
                 self.logger.exception(e)
-                self.logger.warning('Encountered an error while retrieving {}: {}'.
+                self.logger.warning(
-                                    format(self.args.url, str(e)))
+                    'Encountered an error while retrieving %s: %s', self.args.url, e
+                )
 
         Thread(target=_thread_func, name='HttpPoll').start()
 
     def get_new_items(self, response):
-        """ Gets new items out of a response """
+        """Gets new items out of a response"""
-        raise NotImplementedError("get_new_items must be implemented in a derived class")
+        raise NotImplementedError(
+            "get_new_items must be implemented in a derived class"
+        )
 
     def __iter__(self):
-        for (key, value) in self.request_args.items():
+        """
+        :return: The ``request_args`` as key-value pairs.
+        """
+        for key, value in self.request_args.items():
             yield key, value
 
 
 class JsonHttpRequest(HttpRequest):
-    def __init__(self, path=None, *args, **kwargs):
+    """
+    Specialization of the HttpRequest class for JSON requests.
+    """
+
+    def __init__(self, *args, path=None, **kwargs):
         super().__init__(*args, **kwargs)
         self.path = path
         self.seen_entries = set()
@@ -97,7 +121,8 @@ class JsonHttpRequest(HttpRequest):
 
         if self.path:
             m = re.match(r'\${\s*(.*)\s*}', self.path)
-            response = eval(m.group(1))
+            if m:
+                response = eval(m.group(1))  # pylint: disable=eval-used
 
         for entry in response:
             flattened_entry = deep_freeze(entry)
@@ -109,6 +134,11 @@ class JsonHttpRequest(HttpRequest):
 
 
 def deep_freeze(x):
+    """
+    Deep freezes a Python object - works for strings, dictionaries, sets and
+    iterables.
+    """
+
     if isinstance(x, str) or not hasattr(x, "__len__"):
         return x
     if hasattr(x, "keys") and hasattr(x, "values"):
@@ -118,4 +148,5 @@ def deep_freeze(x):
 
     return frozenset(map(deep_freeze, x))
 
+
 # vim:sw=4:ts=4:et:

platypush/backend/music/snapcast/__init__.py

@@ -5,11 +5,17 @@ import threading
 import time
 
 from platypush.backend import Backend
-from platypush.utils import set_thread_name
+from platypush.message.event.music.snapcast import (
-from platypush.message.event.music.snapcast import ClientVolumeChangeEvent, \
+    ClientVolumeChangeEvent,
-    GroupMuteChangeEvent, ClientConnectedEvent, ClientDisconnectedEvent, \
+    GroupMuteChangeEvent,
-    ClientLatencyChangeEvent, ClientNameChangeEvent, GroupStreamChangeEvent, \
+    ClientConnectedEvent,
-    StreamUpdateEvent, ServerUpdateEvent
+    ClientDisconnectedEvent,
+    ClientLatencyChangeEvent,
+    ClientNameChangeEvent,
+    GroupStreamChangeEvent,
+    StreamUpdateEvent,
+    ServerUpdateEvent,
+)
 
 
 class MusicSnapcastBackend(Backend):
@@ -34,8 +40,14 @@ class MusicSnapcastBackend(Backend):
     _DEFAULT_POLL_SECONDS = 10  # Poll servers each 10 seconds
     _SOCKET_EOL = '\r\n'.encode()
 
-    def __init__(self, hosts=None, ports=None,
+    def __init__(
-                 poll_seconds=_DEFAULT_POLL_SECONDS, *args, **kwargs):
+        self,
+        hosts=None,
+        ports=None,
+        poll_seconds=_DEFAULT_POLL_SECONDS,
+        *args,
+        **kwargs,
+    ):
         """
         :param hosts: List of Snapcast server names or IPs to monitor (default:
             `['localhost']`
@@ -72,24 +84,25 @@ class MusicSnapcastBackend(Backend):
         if self._socks.get(host):
             return self._socks[host]
 
-        self.logger.debug('Connecting to {host}:{port}'.format(host=host, port=port))
+        self.logger.debug('Connecting to %s:%d', host, port)
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         sock.connect((host, port))
         self._socks[host] = sock
-        self.logger.info('Connected to {host}:{port}'.format(host=host, port=port))
+        self.logger.info('Connected to %s:%d', host, port)
         return sock
 
     def _disconnect(self, host, port):
         sock = self._socks.get(host)
         if not sock:
-            self.logger.debug('Not connected to {}:{}'.format(host, port))
+            self.logger.debug('Not connected to %s:%d', host, port)
             return
 
         try:
             sock.close()
         except Exception as e:
-            self.logger.warning(('Exception while disconnecting from {host}:{port}: {error}'.
+            self.logger.warning(
-                                 format(host=host, port=port, error=str(e))))
+                'Exception while disconnecting from %s:%d: %s', host, port, e
+            )
         finally:
             self._socks[host] = None
 
@@ -103,7 +116,7 @@ class MusicSnapcastBackend(Backend):
             if ready[0]:
                 buf += sock.recv(1)
             else:
-                return
+                return None
 
         return json.loads(buf.decode().strip())
 
@@ -115,8 +128,9 @@ class MusicSnapcastBackend(Backend):
             client_id = msg.get('params', {}).get('id')
             volume = msg.get('params', {}).get('volume', {}).get('percent')
             muted = msg.get('params', {}).get('volume', {}).get('muted')
-            evt = ClientVolumeChangeEvent(host=host, client=client_id,
+            evt = ClientVolumeChangeEvent(
-                                          volume=volume, muted=muted)
+                host=host, client=client_id, volume=volume, muted=muted
+            )
         elif msg.get('method') == 'Group.OnMute':
             group_id = msg.get('params', {}).get('id')
             muted = msg.get('params', {}).get('mute')
@@ -149,10 +163,8 @@ class MusicSnapcastBackend(Backend):
 
         return evt
 
-    def _client(self, host, port, thread_name):
+    def _client(self, host, port):
         def _thread():
-            set_thread_name(thread_name)
-
             while not self.should_stop():
                 try:
                     sock = self._connect(host, port)
@@ -164,16 +176,20 @@ class MusicSnapcastBackend(Backend):
                         msgs = [msgs]
 
                     for msg in msgs:
-                        self.logger.debug('Received message on {host}:{port}: {msg}'.
+                        self.logger.debug(
-                                          format(host=host, port=port, msg=msg))
+                            'Received message on {host}:{port}: {msg}'.format(
+                                host=host, port=port, msg=msg
+                            )
+                        )
 
-                        # noinspection PyTypeChecker
                         evt = self._parse_msg(host=host, msg=msg)
                         if evt:
                             self.bus.post(evt)
                 except Exception as e:
-                    self.logger.warning('Exception while getting the status ' + 'of the Snapcast server {}:{}: {}'.
+                    self.logger.warning(
-                                        format(host, port, str(e)))
+                        'Exception while getting the status '
+                        + 'of the Snapcast server {}:{}: {}'.format(host, port, str(e))
+                    )
 
                     self._disconnect(host, port)
                 finally:
@@ -184,17 +200,19 @@ class MusicSnapcastBackend(Backend):
     def run(self):
         super().run()
 
-        self.logger.info('Initialized Snapcast backend - hosts: {} ports: {}'.
+        self.logger.info(
-                         format(self.hosts, self.ports))
+            'Initialized Snapcast backend - hosts: {} ports: {}'.format(
+                self.hosts, self.ports
+            )
+        )
 
         while not self.should_stop():
             for i, host in enumerate(self.hosts):
                 port = self.ports[i]
-                thread_name = 'Snapcast-{host}-{port}'.format(host=host, port=port)
+                thread_name = f'Snapcast-{host}-{port}'
 
                 self._threads[host] = threading.Thread(
-                    target=self._client(host, port, thread_name),
+                    target=self._client(host, port), name=thread_name
-                    name=thread_name
                 )
 
                 self._threads[host].start()
@@ -211,8 +229,11 @@ class MusicSnapcastBackend(Backend):
                 try:
                     sock.close()
                 except Exception as e:
-                    self.logger.warning('Could not close Snapcast connection to {}: {}: {}'.format(
+                    self.logger.warning(
-                        host, type(e), str(e)))
+                        'Could not close Snapcast connection to {}: {}: {}'.format(
+                            host, type(e), str(e)
+                        )
+                    )
 
 
 # vim:sw=4:ts=4:et:

platypush/backend/tcp/__init__.py

@@ -6,7 +6,6 @@ from typing import Optional
 
 from platypush.backend import Backend
 from platypush.message import Message
-from platypush.utils import set_thread_name
 
 
 class TcpBackend(Backend):
@@ -17,19 +16,20 @@ class TcpBackend(Backend):
     # Maximum length of a request to be processed
     _MAX_REQ_SIZE = 2048
 
-    def __init__(self, port, bind_address=None, listen_queue=5, *args, **kwargs):
+    def __init__(self, port, bind_address=None, listen_queue=5, **kwargs):
         """
         :param port: TCP port number
         :type port: int
 
-        :param bind_address: Specify a bind address if you want to hook the service to a specific interface (default: listen for any connections)
+        :param bind_address: Specify a bind address if you want to hook the
+            service to a specific interface (default: listen for any connections).
         :type bind_address: str
 
         :param listen_queue: Maximum number of queued connections (default: 5)
         :type listen_queue: int
         """
 
-        super().__init__(*args, **kwargs)
+        super().__init__(name=self.__class__.__name__, **kwargs)
 
         self.port = port
         self.bind_address = bind_address or '0.0.0.0'
@@ -46,8 +46,11 @@ class TcpBackend(Backend):
 
             while not self.should_stop():
                 if processed_bytes > self._MAX_REQ_SIZE:
-                    self.logger.warning('Ignoring message longer than {} bytes from {}'
+                    self.logger.warning(
-                                        .format(self._MAX_REQ_SIZE, address[0]))
+                        'Ignoring message longer than {} bytes from {}'.format(
+                            self._MAX_REQ_SIZE, address[0]
+                        )
+                    )
                     return
 
                 ch = sock.recv(1)
@@ -76,17 +79,16 @@ class TcpBackend(Backend):
                 return
 
             msg = Message.build(msg)
-            self.logger.info('Received request from {}: {}'.format(msg, address[0]))
+            self.logger.info('Received request from %s: %s', msg, address[0])
             self.on_message(msg)
 
             response = self.get_message_response(msg)
-            self.logger.info('Processing response on the TCP backend: {}'.format(response))
+            self.logger.info('Processing response on the TCP backend: %s', response)
 
             if response:
                 sock.send(str(response).encode())
 
         def _f_wrapper():
-            set_thread_name('TCPListener')
             try:
                 _f()
             finally:
@@ -111,11 +113,16 @@ class TcpBackend(Backend):
         serv_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         serv_sock.settimeout(0.5)
 
-        self.logger.info('Initialized TCP backend on port {} with bind address {}'.
+        self.logger.info(
-                         format(self.port, self.bind_address))
+            'Initialized TCP backend on port %s with bind address %s',
+            self.port,
+            self.bind_address,
+        )
 
         serv_sock.listen(self.listen_queue)
-        self._srv = multiprocessing.Process(target=self._accept_process, args=(serv_sock,))
+        self._srv = multiprocessing.Process(
+            target=self._accept_process, args=(serv_sock,)
+        )
         self._srv.start()
 
         while not self.should_stop():
@@ -124,7 +131,7 @@ class TcpBackend(Backend):
             except (socket.timeout, queue.Empty):
                 continue
 
-            self.logger.info('Accepted connection from client {}'.format(address[0]))
+            self.logger.info('Accepted connection from client %s', address[0])
             self._process_client(sock, address)
 
         if self._srv:

platypush/cron/scheduler.py

@@ -8,7 +8,7 @@ import croniter
 from dateutil.tz import gettz
 
 from platypush.procedure import Procedure
-from platypush.utils import is_functional_cron, set_thread_name
+from platypush.utils import is_functional_cron
 
 logger = logging.getLogger('platypush:cron')
 
@@ -52,7 +52,7 @@ class Cronjob(threading.Thread):
     """
 
     def __init__(self, name, cron_expression, actions):
-        super().__init__()
+        super().__init__(name=f'cron:{name}')
         self.cron_expression = cron_expression
         self.name = name
         self.state = CronjobState.IDLE
@@ -79,7 +79,6 @@ class Cronjob(threading.Thread):
         """
         Inner logic of the cronjob thread.
         """
-        set_thread_name(f'cron:{self.name}')
 
         # Wait until an event is received or the next execution slot is reached
         self.wait()
@@ -203,7 +202,7 @@ class CronScheduler(threading.Thread):
         logger.info('Running cron scheduler')
 
         while not self.should_stop():
-            for (job_name, job_config) in self.jobs_config.items():
+            for job_name, job_config in self.jobs_config.items():
                 job = self._get_job(name=job_name, config=job_config)
                 if job.state == CronjobState.IDLE:
                     try:

platypush/entities/_engine/__init__.py

@@ -5,7 +5,6 @@ from typing import Dict, Optional
 from platypush.context import get_bus
 from platypush.entities import Entity
 from platypush.message.event.entities import EntityUpdateEvent
-from platypush.utils import set_thread_name
 
 from platypush.entities._base import EntityKey, EntitySavedCallback
 from platypush.entities._engine.queue import EntitiesQueue
@@ -99,7 +98,6 @@ class EntitiesEngine(Thread):
 
     def run(self):
         super().run()
-        set_thread_name('entities')
         self.logger.info('Started entities engine')
         self._running.set()
 

platypush/event/hook.py

@@ -3,20 +3,23 @@ import json
 import logging
 import threading
 from functools import wraps
+from typing import Optional, Type
 
 from platypush.common import exec_wrapper
 from platypush.config import Config
 from platypush.message.event import Event
 from platypush.message.request import Request
 from platypush.procedure import Procedure
-from platypush.utils import get_event_class_by_type, set_thread_name, is_functional_hook
+from platypush.utils import get_event_class_by_type, is_functional_hook
 
 logger = logging.getLogger('platypush')
 
 
 def parse(msg):
-    """Builds a dict given another dictionary or
+    """
-    a JSON UTF-8 encoded string/bytearray"""
+    Builds a dict given another dictionary or a JSON UTF-8 encoded
+    string/bytearray.
+    """
 
     if isinstance(msg, (bytes, bytearray)):
         msg = msg.decode('utf-8')
@@ -24,16 +27,18 @@ def parse(msg):
         try:
             msg = json.loads(msg.strip())
         except json.JSONDecodeError:
-            logger.warning('Invalid JSON message: {}'.format(msg))
+            logger.warning('Invalid JSON message: %s', msg)
             return None
 
     return msg
 
 
+# pylint: disable=too-few-public-methods
 class EventCondition:
     """Event hook condition class"""
 
-    def __init__(self, type=Event.__class__, priority=None, **kwargs):
+    # pylint: disable=redefined-builtin
+    def __init__(self, type: Optional[Type[Event]] = None, priority=None, **kwargs):
         """
         Rule constructor.
         Params:
@@ -42,40 +47,40 @@ class EventCondition:
                 or recognized_phrase='Your phrase')
         """
 
-        self.type = type
+        self.type = type or Event.__class__  # type: ignore
         self.args = {}
         self.parsed_args = {}
         self.priority = priority
 
-        for (key, value) in kwargs.items():
+        for key, value in kwargs.items():
-            # TODO So far we only allow simple value match. If value is a dict
-            # instead, we should allow more a sophisticated attribute matching,
-            # e.g. or conditions, in, and other operators.
             self.args[key] = value
 
     @classmethod
     def build(cls, rule):
-        """Builds a rule given either another EventRule, a dictionary or
+        """
-        a JSON UTF-8 encoded string/bytearray"""
+        Builds a rule given either another EventRule, a dictionary or a JSON
+        UTF-8 encoded string/bytearray.
+        """
 
         if isinstance(rule, cls):
             return rule
-        else:
-            rule = parse(rule)
 
+        rule = parse(rule)
         assert isinstance(rule, dict), f'Not a valid rule: {rule}'
         type = get_event_class_by_type(rule.pop('type') if 'type' in rule else 'Event')
 
         args = {}
-        for (key, value) in rule.items():
+        for key, value in rule.items():
             args[key] = value
 
         return cls(type=type, **args)
 
 
 class EventAction(Request):
-    """Event hook action class. It is a special type of runnable request
+    """
-    whose fields can be configured later depending on the event context"""
+    Event hook action class. It is a special type of runnable request whose
+    fields can be configured later depending on the event context.
+    """
 
     def __init__(self, target=None, action=None, **args):
         if target is None:
@@ -84,30 +89,34 @@ class EventAction(Request):
         super().__init__(target=target, action=action, **args_copy)
 
     @classmethod
-    def build(cls, action):
+    def build(cls, msg):
-        action = super().parse(action)
+        msg = super().parse(msg)
-        action['origin'] = Config.get('device_id')
+        msg['origin'] = Config.get('device_id')
 
-        if 'target' not in action:
+        if 'target' not in msg:
-            action['target'] = action['origin']
+            msg['target'] = msg['origin']
 
         token = Config.get('token')
         if token:
-            action['token'] = token
+            msg['token'] = token
 
-        return super().build(action)
+        return super().build(msg)
 
 
 class EventHook:
-    """Event hook class. It consists of one conditions and
+    """
-    one or multiple actions to be executed"""
+    Event hook class. It consists of one conditions and one or multiple actions
+    to be executed.
+    """
 
     def __init__(self, name, priority=None, condition=None, actions=None):
-        """Constructor. Takes a name, a EventCondition object and an event action
+        """
-        procedure as input. It may also have a priority attached
+        Takes a name, a EventCondition object and an event action procedure as
-        as a positive number. If multiple hooks match against an event,
+        input. It may also have a priority attached as a positive number. If
-        only the ones that have either the maximum match score or the
+        multiple hooks match against an event, only the ones that have either
-        maximum pre-configured priority will be run."""
+        the maximum match score or the maximum pre-configured priority will be
+        run.
+        """
 
         self.name = name
         self.condition = EventCondition.build(condition or {})
@@ -116,23 +125,27 @@ class EventHook:
         self.condition.priority = self.priority
 
     @classmethod
-    def build(cls, name, hook):
+    def build(cls, name, hook):  # pylint: disable=redefined-outer-name
-        """Builds a rule given either another EventRule, a dictionary or
+        """
-        a JSON UTF-8 encoded string/bytearray"""
+        Builds a rule given either another EventRule, a dictionary or a JSON
+        UTF-8 encoded string/bytearray.
+        """
 
         if isinstance(hook, cls):
             return hook
-        else:
-            hook = parse(hook)
 
+        hook = parse(hook)
         if is_functional_hook(hook):
             actions = Procedure(name=name, requests=[hook], _async=False)
-            return cls(name=name, condition=hook.condition, actions=actions)
+            return cls(
+                name=name, condition=getattr(hook, 'condition', None), actions=actions
+            )
 
         assert isinstance(hook, dict)
         condition = EventCondition.build(hook['if']) if 'if' in hook else None
         actions = []
         priority = hook['priority'] if 'priority' in hook else None
+        if condition:
             condition.priority = priority
 
         if 'then' in hook:
@@ -145,29 +158,38 @@ class EventHook:
         return cls(name=name, condition=condition, actions=actions, priority=priority)
 
     def matches_event(self, event):
-        """Returns an EventMatchResult object containing the information
+        """
-        about the match between the event and this hook"""
+        Returns an EventMatchResult object containing the information about the
+        match between the event and this hook.
+        """
 
         return event.matches_condition(self.condition)
 
     def run(self, event):
-        """Checks the condition of the hook against a particular event and
+        """
-        runs the hook actions if the condition is met"""
+        Checks the condition of the hook against a particular event and runs
+        the hook actions if the condition is met.
+        """
 
         def _thread_func(result):
-            set_thread_name('Event-' + self.name)
+            executor = getattr(self.actions, 'execute', None)
-            self.actions.execute(event=event, **result.parsed_args)
+            if executor and callable(executor):
+                executor(event=event, **result.parsed_args)
 
         result = self.matches_event(event)
 
         if result.is_match:
-            logger.info('Running hook {} triggered by an event'.format(self.name))
+            logger.info('Running hook %s triggered by an event', self.name)
             threading.Thread(
                 target=_thread_func, name='Event-' + self.name, args=(result,)
             ).start()
 
 
 def hook(event_type=Event, **condition):
+    """
+    Decorator used for event hook functions.
+    """
+
     def wrapper(f):
         f.hook = True
         f.condition = EventCondition(type=event_type, **condition)

platypush/message/request/__init__.py

@@ -30,7 +30,7 @@ class Request(Message):
         target,
         action,
         origin=None,
-        id=None,
+        id=None,  # pylint: disable=redefined-builtin
         backend=None,
         args=None,
         token=None,
@@ -109,8 +109,6 @@ class Request(Message):
         return proc.execute(*args, **kwargs)
 
     def _expand_context(self, event_args=None, **context):
-        from platypush.config import Config
-
         if event_args is None:
             event_args = copy.deepcopy(self.args)
 
@@ -138,16 +136,19 @@ class Request(Message):
         return event_args
 
     @classmethod
+    # pylint: disable=too-many-branches
     def expand_value_from_context(cls, _value, **context):
         for k, v in context.items():
             if isinstance(v, Message):
                 v = json.loads(str(v))
             try:
-                exec('{}={}'.format(k, v))
+                exec('{}={}'.format(k, v))  # pylint: disable=exec-used
             except Exception:
                 if isinstance(v, str):
                     try:
-                        exec('{}="{}"'.format(k, re.sub(r'(^|[^\\])"', '\1\\"', v)))
+                        exec(  # pylint: disable=exec-used
+                            '{}="{}"'.format(k, re.sub(r'(^|[^\\])"', '\1\\"', v))
+                        )
                     except Exception as e2:
                         logger.debug(
                             'Could not set context variable %s=%s: %s', k, v, e2
@@ -167,7 +168,7 @@ class Request(Message):
                 _value = m.group(4)
 
                 try:
-                    context_value = eval(inner_expr)
+                    context_value = eval(inner_expr)  # pylint: disable=eval-used
 
                     if callable(context_value):
                         context_value = context_value()
@@ -209,6 +210,7 @@ class Request(Message):
                 redis.send_message(queue_name, response)
                 redis.expire(queue_name, 60)
 
+    # pylint: disable=too-many-statements
     def execute(self, n_tries=1, _async=True, **context):
         """
         Execute this request and returns a Response object
@@ -224,6 +226,7 @@ class Request(Message):
                     - group: ${group_name}  # will be expanded as "Kitchen lights")
         """
 
+        # pylint: disable=too-many-branches
         def _thread_func(_n_tries, errors=None):
             from platypush.context import get_bus
             from platypush.plugins import RunnablePlugin

platypush/plugins/light/hue/__init__.py

@@ -24,7 +24,6 @@ from platypush.message.event.light import (
     LightStatusChangeEvent,
 )
 from platypush.plugins import RunnablePlugin, action
-from platypush.utils import set_thread_name
 
 
 class LightHuePlugin(RunnablePlugin, LightEntityManager):
@@ -1054,7 +1053,6 @@ class LightHuePlugin(RunnablePlugin, LightEntityManager):
             return self._animation_stop.is_set()
 
         def _animate_thread(lights):
-            set_thread_name('HueAnimate')
             get_bus().post(
                 LightAnimationStartedEvent(
                     lights=lights,
@@ -1209,7 +1207,7 @@ class LightHuePlugin(RunnablePlugin, LightEntityManager):
     def status(self, *_, **__) -> Iterable[LightEntity]:
         lights = self.transform_entities(self._get_lights(publish_entities=True))
         for light in lights:
-            light.id = light.external_id
+            light.id = light.external_id  # type: ignore
             for attr, value in (light.data or {}).items():
                 setattr(light, attr, value)
 

platypush/utils/__init__.py

@@ -89,7 +89,7 @@ def get_plugin_class_by_name(plugin_name):
 
     module = get_plugin_module_by_name(plugin_name)
     if not module:
-        return
+        return None
 
     class_name = getattr(
         module, ''.join([_.capitalize() for _ in plugin_name.split('.')]) + 'Plugin'
@@ -126,7 +126,7 @@ def get_backend_class_by_name(backend_name: str):
 
     module = get_backend_module_by_name(backend_name)
     if not module:
-        return
+        return None
 
     class_name = getattr(
         module,
@@ -149,7 +149,7 @@ def get_backend_class_by_name(backend_name: str):
         return None
 
 
-def get_backend_name_by_class(backend) -> Optional[str]:
+def get_backend_name_by_class(backend) -> str:
     """Gets the common name of a backend (e.g. "http" or "mqtt") given its class."""
 
     from platypush.backend import Backend
@@ -206,12 +206,14 @@ def get_decorators(cls, climb_class_hierarchy=False):
 
     decorators = {}
 
-    # noinspection PyPep8Naming
     def visit_FunctionDef(node):
         for n in node.decorator_list:
             if isinstance(n, ast.Call):
-                # noinspection PyUnresolvedReferences
+                name = (
-                name = n.func.attr if isinstance(n.func, ast.Attribute) else n.func.id
+                    n.func.attr
+                    if isinstance(n.func, ast.Attribute)
+                    else n.func.id  # type: ignore
+                )
             else:
                 name = n.attr if isinstance(n, ast.Attribute) else n.id
 
@@ -257,6 +259,7 @@ def _get_ssl_context(
     else:
         ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
 
+    assert ssl_cert, 'No certificate specified'
     if ssl_cafile or ssl_capath:
         ssl_context.load_verify_locations(cafile=ssl_cafile, capath=ssl_capath)
 
@@ -311,18 +314,6 @@ def get_ssl_client_context(
     )
 
 
-def set_thread_name(name: str):
-    """
-    Set the name of the current thread.
-    """
-    try:
-        import prctl
-
-        prctl.set_name(name)  # pylint: disable=no-member
-    except ImportError:
-        logger.debug('Unable to set thread name: prctl module is missing')
-
-
 def find_bins_in_path(bin_name):
     """
     Search for a binary in the PATH variable.
@@ -399,7 +390,6 @@ def get_mime_type(resource: str) -> Optional[str]:
         offset = len('file://')
         resource = resource[offset:]
 
-    # noinspection HttpUrlsUsage
     if resource.startswith('http://') or resource.startswith('https://'):
         with urllib.request.urlopen(resource) as response:
             return response.info().get_content_type()
@@ -442,6 +432,8 @@ def grouper(n, iterable, fillvalue=None):
     for chunk in zip_longest(*args):
         yield filter(None, chunk)
 
+    return
+
 
 def is_functional_procedure(obj) -> bool:
     """
@@ -529,7 +521,7 @@ def get_or_generate_jwt_rsa_key_pair():
     """
     from platypush.config import Config
 
-    key_dir = os.path.join(Config.get('workdir'), 'jwt')
+    key_dir = os.path.join(Config.workdir, 'jwt')
     priv_key_file = os.path.join(key_dir, 'id_rsa')
     pub_key_file = priv_key_file + '.pub'
 

requirements.txt

@@ -13,7 +13,6 @@ marshmallow_dataclass
 paho-mqtt
 python-dateutil
 python-magic
-python-prctl
 pyyaml
 redis
 requests

setup.py

@@ -83,8 +83,6 @@ setup(
         'zeroconf>=0.27.0',
     ],
     extras_require={
-        # Support for thread custom name
-        'threadname': ['python-prctl'],
         # Support for Kafka backend and plugin
         'kafka': ['kafka-python'],
         # Support for Pushbullet backend and plugin