added flake8/black, pre-commit integration for flake8/black, and black formatting changes

daemon/examples/stopsession.py

@@ -14,12 +14,13 @@ from core.emulator.enumerations import CORE_API_PORT, MessageFlags, SessionTlvs
 
 def main():
     parser = optparse.OptionParser(usage="usage: %prog [-l] <sessionid>")
-    parser.add_option("-l", "--list", dest="list", action="store_true",
-                      help="list running sessions")
+    parser.add_option(
+        "-l", "--list", dest="list", action="store_true", help="list running sessions"
+    )
     (options, args) = parser.parse_args()
 
     if options.list is True:
-        num = '0'
+        num = "0"
         flags = MessageFlags.STRING.value
     else:
         num = args[0]
@@ -28,7 +29,7 @@ def main():
     message = coreapi.CoreSessionMessage.pack(flags, tlvdata)
 
     sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    sock.connect(('localhost', CORE_API_PORT))
+    sock.connect(("localhost", CORE_API_PORT))
     sock.send(message)
 
     # receive and print a session list