add-black (#1593)

* Add black

Update pre commit

Update pre commit

add empty line

* Format with black

esphome/mqtt.py

@@ -7,9 +7,20 @@ import time
 
 import paho.mqtt.client as mqtt
 
-from esphome.const import CONF_BROKER, CONF_DISCOVERY_PREFIX, CONF_ESPHOME, \
-    CONF_LOG_TOPIC, CONF_MQTT, CONF_NAME, CONF_PASSWORD, CONF_PORT, CONF_SSL_FINGERPRINTS, \
-    CONF_TOPIC, CONF_TOPIC_PREFIX, CONF_USERNAME
+from esphome.const import (
+    CONF_BROKER,
+    CONF_DISCOVERY_PREFIX,
+    CONF_ESPHOME,
+    CONF_LOG_TOPIC,
+    CONF_MQTT,
+    CONF_NAME,
+    CONF_PASSWORD,
+    CONF_PORT,
+    CONF_SSL_FINGERPRINTS,
+    CONF_TOPIC,
+    CONF_TOPIC_PREFIX,
+    CONF_USERNAME,
+)
 from esphome.core import CORE, EsphomeError
 from esphome.helpers import color
 from esphome.util import safe_print
@@ -36,21 +47,24 @@ def initialize(config, subscriptions, on_message, username, password, client_id)
             except OSError:
                 pass
 
-            wait_time = min(2**tries, 300)
+            wait_time = min(2 ** tries, 300)
             _LOGGER.warning(
                 "Disconnected from MQTT (%s). Trying to reconnect in %s s",
-                result_code, wait_time)
+                result_code,
+                wait_time,
+            )
             time.sleep(wait_time)
             tries += 1
 
-    client = mqtt.Client(client_id or '')
+    client = mqtt.Client(client_id or "")
     client.on_connect = on_connect
     client.on_message = on_message
     client.on_disconnect = on_disconnect
     if username is None:
         if config[CONF_MQTT].get(CONF_USERNAME):
-            client.username_pw_set(config[CONF_MQTT][CONF_USERNAME],
-                                   config[CONF_MQTT][CONF_PASSWORD])
+            client.username_pw_set(
+                config[CONF_MQTT][CONF_USERNAME], config[CONF_MQTT][CONF_PASSWORD]
+            )
     elif username:
         client.username_pw_set(username, password)
 
@@ -59,8 +73,14 @@ def initialize(config, subscriptions, on_message, username, password, client_id)
             tls_version = ssl.PROTOCOL_TLS  # pylint: disable=no-member
         else:
             tls_version = ssl.PROTOCOL_SSLv23
-        client.tls_set(ca_certs=None, certfile=None, keyfile=None, cert_reqs=ssl.CERT_REQUIRED,
-                       tls_version=tls_version, ciphers=None)
+        client.tls_set(
+            ca_certs=None,
+            certfile=None,
+            keyfile=None,
+            cert_reqs=ssl.CERT_REQUIRED,
+            tls_version=tls_version,
+            ciphers=None,
+        )
 
     try:
         host = str(config[CONF_MQTT][CONF_BROKER])
@@ -84,17 +104,17 @@ def show_logs(config, topic=None, username=None, password=None, client_id=None):
         if CONF_LOG_TOPIC in conf:
             topic = config[CONF_MQTT][CONF_LOG_TOPIC][CONF_TOPIC]
         elif CONF_TOPIC_PREFIX in config[CONF_MQTT]:
-            topic = config[CONF_MQTT][CONF_TOPIC_PREFIX] + '/debug'
+            topic = config[CONF_MQTT][CONF_TOPIC_PREFIX] + "/debug"
         else:
-            topic = config[CONF_ESPHOME][CONF_NAME] + '/debug'
+            topic = config[CONF_ESPHOME][CONF_NAME] + "/debug"
     else:
         _LOGGER.error("MQTT isn't setup, can't start MQTT logs")
         return 1
     _LOGGER.info("Starting log output from %s", topic)
 
     def on_message(client, userdata, msg):
-        time_ = datetime.now().time().strftime('[%H:%M:%S]')
-        payload = msg.payload.decode(errors='backslashreplace')
+        time_ = datetime.now().time().strftime("[%H:%M:%S]")
+        payload = msg.payload.decode(errors="backslashreplace")
         message = time_ + payload
         safe_print(message)
 
@@ -103,12 +123,14 @@ def show_logs(config, topic=None, username=None, password=None, client_id=None):
 
 def clear_topic(config, topic, username=None, password=None, client_id=None):
     if topic is None:
-        discovery_prefix = config[CONF_MQTT].get(CONF_DISCOVERY_PREFIX, 'homeassistant')
+        discovery_prefix = config[CONF_MQTT].get(CONF_DISCOVERY_PREFIX, "homeassistant")
         name = config[CONF_ESPHOME][CONF_NAME]
-        topic = f'{discovery_prefix}/+/{name}/#'
+        topic = f"{discovery_prefix}/+/{name}/#"
     _LOGGER.info("Clearing messages from '%s'", topic)
-    _LOGGER.info("Please close this window when no more messages appear and the "
-                 "MQTT topic has been cleared of retained messages.")
+    _LOGGER.info(
+        "Please close this window when no more messages appear and the "
+        "MQTT topic has been cleared of retained messages."
+    )
 
     def on_message(client, userdata, msg):
         if not msg.payload or not msg.retain:
@@ -136,7 +158,9 @@ def get_fingerprint(config):
 
     sha1 = hashlib.sha1(cert_der).hexdigest()
 
-    safe_print("SHA1 Fingerprint: " + color('cyan', sha1))
-    safe_print("Copy the string above into mqtt.ssl_fingerprints section of {}"
-               "".format(CORE.config_path))
+    safe_print("SHA1 Fingerprint: " + color("cyan", sha1))
+    safe_print(
+        "Copy the string above into mqtt.ssl_fingerprints section of {}"
+        "".format(CORE.config_path)
+    )
     return 0