minor style fix

nandod

@@ -132,7 +132,7 @@ class DataBase:
         except:
             return
         self.db = self.conn.cursor()
-        if desc is "":
+        if desc == "":
             self.db.execute(
                 "INSERT OR REPLACE INTO alive(id,ip,date) \
                VALUES(?,?,?)",
@@ -252,6 +252,7 @@ td, th {
 
         return "\n\r".join(msg)
 
+
 class UDPServe:
     def __init__(self, opts):
         self.server = socketserver.UDPServer((opts.HOST, opts.PORT), UDPHandler)
@@ -287,7 +288,6 @@ class TCPServe:
         self.server.server_close()
 
 
-
 def humanize_time(secs):
     mins, secs = divmod(secs, 60)
     hours, mins = divmod(mins, 60)