diff --git a/Features/Command/Callback.py b/Features/Command/Callback.py
index e6c7774..72520f4 100644
--- a/Features/Command/Callback.py
+++ b/Features/Command/Callback.py
@@ -3,21 +3,21 @@ from .Response import Response
 import re
 
 class Callback:
-    def __init__(this, patterns, quiet = False, once = True):
-        this.patterns = patterns
-        this.quiet = quiet
-        this.once = once
+    def __init__(self, patterns, quiet = False, once = True):
+        self.patterns = patterns
+        self.quiet = quiet
+        self.once = once
 
-    def setStart(this, function):
-        this.start = function
+    def setStart(self, function):
+        self.start = function
 
-    def start(this, params):
+    def start(self, params):
         pass
 
-    def answer(this, string):
-        for pattern in this.patterns:
+    def answer(self, string):
+        for pattern in self.patterns:
             if match := re.search(re.compile(Command.compilePattern(pattern)), string):
-                return this.start({**match.groupdict(), 'string':string})
+                return self.start({**match.groupdict(), 'string':string})
         return None
 
     @staticmethod
diff --git a/Features/Command/Command.py b/Features/Command/Command.py
index ced38b3..1db4a48 100644
--- a/Features/Command/Command.py
+++ b/Features/Command/Command.py
@@ -7,16 +7,16 @@
 #       must return dict like {'cmd': cmd, 'params': params}
 #   Command.reg_find()      - recognize command from a string with regexe patterns, return command object
 #       must return dict like {'cmd': cmd, 'params': params}
-#   this                    - object (class instance) pointer (self)
-#   abstract this.start()   - required method for all commands
-#   this.keywords           - dictionary of arrays keywords
+#   self                    - object (class instance) pointer (self)
+#   abstract self.start()   - required method for all commands
+#   self.keywords           - dictionary of arrays keywords
 #       like {
 #           (int)weight  : ['word1', 'word2', 'word3'],
 #           (int)weight1 : ['word3', 'word4'],
 #           (int)weight2 : ['word5', 'word6', 'word7', 'word8', 'word9'],
 #       }
-#   this.patterns           - list of command patterns
-#   this.subpatterns        - list of subpaterns (context patterns)
+#   self.patterns           - list of command patterns
+#   self.subpatterns        - list of subpaterns (context patterns)
 #       like ['* который * час *', '* скольк* * (врем|час)* *']
 #   Command._entities       - linked patterns   $Pattern
 #   Command.regex           - regex patterns dict for better syntax
@@ -70,24 +70,24 @@ class Command(ABC):
         #   one or more of the list, without order     {a|b|c}
         '\{((?:.*\|?)*?.*?)\}': r'(?:\1)+?',
     }
-    def __init__(this, name, keywords = {}, patterns = [], subPatterns = []):                 #   initialisation of new command
-        this._name          = name
-        this._keywords      = keywords
-        this._patterns      = patterns
-        this._subPatterns   = subPatterns
-        Command.append(this)
+    def __init__(self, name, keywords = {}, patterns = [], subPatterns = []):                 #   initialisation of new command
+        self._name          = name
+        self._keywords      = keywords
+        self._patterns      = patterns
+        self._subPatterns   = subPatterns
+        Command.append(self)
 
-    def __str__(this):
-        str = f'{this.__class__.__name__}.{this.getName()}:\n'
-        for key, value in this._keywords.items():
+    def __str__(self):
+        str = f'{self.__class__.__name__}.{self.getName()}:\n'
+        for key, value in self._keywords.items():
             str += f'\t{key}:\t{value}\n'
         return str
 
 ######################################################################################
 #                            CONTROL KEYWORDS                                        #
 ######################################################################################
-    def getKeyword(this, string):                                  #   return position of the keyword
-        for weight, array in this._keywords.items():
+    def getKeyword(self, string):                                  #   return position of the keyword
+        for weight, array in self._keywords.items():
             index = 0
             for word in array:
                 if string == word:
@@ -95,24 +95,24 @@ class Command(ABC):
                 index += 1
         return None #   if not found
 
-    def removeKeyword(this, string):
-        position = this.getKeyword(string)
-        if(position): del this._keywords[ position[0] ][ position[1] ]
+    def removeKeyword(self, string):
+        position = self.getKeyword(string)
+        if(position): del self._keywords[ position[0] ][ position[1] ]
 
-    def addKeyword(this, weight, string):                           #   add new keywords to end of the list
-        if this.getKeyword(string): return
-        if( this._keywords.get(weight) ):   this._keywords[weight].append(string)
-        else:                               this._keywords[weight] = [string]
+    def addKeyword(self, weight, string):                           #   add new keywords to end of the list
+        if self.getKeyword(string): return
+        if( self._keywords.get(weight) ):   self._keywords[weight].append(string)
+        else:                               self._keywords[weight] = [string]
 
-    def changeKeyword(this, weight, name):                          #   set new weight to keyword   (find by name)
-        this.removeKeyword(name)
-        this.addKeyword(weight, name)
+    def changeKeyword(self, weight, name):                          #   set new weight to keyword   (find by name)
+        self.removeKeyword(name)
+        self.addKeyword(weight, name)
 
-    def checkContext(this, string):                                 #   return cmd if the string matches the cmd context
-        for pattern in this.getSubPatterns():
+    def checkContext(self, string):                                 #   return cmd if the string matches the cmd context
+        for pattern in self.getSubPatterns():
             if match := re.search(re.compile(Command.compilePattern(pattern)), string):
                 return {
-                'cmd': this,
+                'cmd': self,
                 'params': {**match.groupdict(), 'string':string},   #   return parans+initial text
             }
         raise Exception("Not Found")                                #   raise exception if context not found
@@ -120,29 +120,29 @@ class Command(ABC):
 ######################################################################################
 #                                     SETTERS                                        #
 ######################################################################################
-    def setStart(this, function):                                   #   define start    (required)
-        this.start = function
+    def setStart(self, function):                                   #   define start    (required)
+        self.start = function
 
 ######################################################################################
 #                                     GETTERS                                        #
 ######################################################################################
-    def getName(this):
-        return this._name
+    def getName(self):
+        return self._name
 
-    def getKeywords(this):
-        return this._keywords
+    def getKeywords(self):
+        return self._keywords
 
-    def getPatterns(this):
-        return this._patterns
+    def getPatterns(self):
+        return self._patterns
 
-    def getSubPatterns(this):
-        return this._subPatterns
+    def getSubPatterns(self):
+        return self._subPatterns
 
 ######################################################################################
 #                               ABSTRACT METHODS                                     #
 ######################################################################################
     @abstractmethod
-    def start(this, params):                    #   main method
+    def start(self, params):                    #   main method
         pass
 
 ######################################################################################
diff --git a/Features/Command/Response.py b/Features/Command/Response.py
index ba9df60..cec427b 100644
--- a/Features/Command/Response.py
+++ b/Features/Command/Response.py
@@ -1,6 +1,6 @@
 class Response:
-    def __init__(this, voice, text, callback = None, thread = None):
-        this.voice: str = voice
-        this.text: str = text
-        this.callback: Callback = callback
-        this.thread = thread
+    def __init__(self, voice, text, callback = None, thread = None):
+        self.voice: str = voice
+        self.text: str = text
+        self.callback: Callback = callback
+        self.thread = thread
diff --git a/Features/Media/Media.py b/Features/Media/Media.py
index 4d27d3c..e4875bd 100644
--- a/Features/Media/Media.py
+++ b/Features/Media/Media.py
@@ -1,5 +1,5 @@
 from ..Command import Command
 
 class Media(Command):
-    def start(this, string):                    #   main method
+    def start(self, string):                    #   main method
         pass
diff --git a/Features/QA/QA.py b/Features/QA/QA.py
index f9da5cd..434d6f8 100644
--- a/Features/QA/QA.py
+++ b/Features/QA/QA.py
@@ -7,9 +7,9 @@ import json
 import re
 
 class QA(Command):
-    def confirm(this, string): return True
+    def confirm(self, string): return True
 
-    def googleDictionary(this, word):
+    def googleDictionary(self, word):
         responce = requests.get(f'https://api.dictionaryapi.dev/api/v2/entries/ru/{word}')
         if responce.status_code == 200:
             responce = json.loads(responce.content)
@@ -41,32 +41,32 @@ class QA(Command):
             }
         return {}
 
-    def wikipedia(this, word):
+    def wikipedia(self, word):
         wiki.set_lang("ru")
         article = wiki.summary(word, sentences=5)
         try:    return article[:article.find('\n\n')][:600]
         except: return ''
 
-    def googleSearch(this, word):
+    def googleSearch(self, word):
         responce = requests.get(f'https://www.google.ru/search?&q={word}&lr=lang_ru&lang=ru')
         page = BS(responce.content, 'html.parser')
         info = page.select('div.BNeawe>div>div.BNeawe')
         return info[0].get_text() if info else ''
 
-    def start(this, params):
+    def start(self, params):
         query = params['string']
         if 'вики' in query:
             query = query.replace('википедия', '').replace('вики', '').strip()
-            try:    search = this.googleSearch(query)
+            try:    search = self.googleSearch(query)
             except: search = ''
-            try:    wiki   = this.wikipedia(query) if not 'Википедия' in search else ''
+            try:    wiki   = self.wikipedia(query) if not 'Википедия' in search else ''
             except: wiki   = ''
-            try:    gdict  = this.googleDictionary(query)
+            try:    gdict  = self.googleDictionary(query)
             except: gdict  = []
             voice          = search or (gdict['short'] if gdict else '') or wiki
             text           = (f'Google Search:\n\t{search}' if search else '') + (f'\n\nWikipedia:\n\t{wiki}' if wiki else '') + ('\n\nDictionary:'+gdict['text'] if gdict else '')
         else:
-            try:    search = this.googleSearch(query)
+            try:    search = self.googleSearch(query)
             except: search = ''
             voice = text = search or random.choice(['Не совсем понимаю, о чём вы.', 'Вот эта последняя фраза мне не ясна.', 'А вот это не совсем понятно.', 'Можете сказать то же самое другими словами?', 'Вот сейчас я совсем вас не понимаю.', 'Попробуйте выразить свою мысль по-другому',])
         return Response(text = text, voice = voice)
diff --git a/Features/Raspi/Raspi.py b/Features/Raspi/Raspi.py
index a1c440c..5d13c3c 100644
--- a/Features/Raspi/Raspi.py
+++ b/Features/Raspi/Raspi.py
@@ -2,7 +2,7 @@ from ..Command import Command                     #   import parent class
 import os
 
 class Raspi(Command):
-    def start(this, string):                    #   main method
+    def start(self, string):                    #   main method
         pass
 
     @staticmethod
diff --git a/Features/SmallTalk/SmallTalk.py b/Features/SmallTalk/SmallTalk.py
index 8b2636a..3c5d1fb 100644
--- a/Features/SmallTalk/SmallTalk.py
+++ b/Features/SmallTalk/SmallTalk.py
@@ -6,5 +6,5 @@
 from ..Command import Command                     #   import parent class
 
 class SmallTalk(Command):
-    def start(this, string):                    #   main method
+    def start(self, string):                    #   main method
         print(f'Hello, {string=}')
diff --git a/Features/SmartHome/SmartHome.py b/Features/SmartHome/SmartHome.py
index b51c3a2..8fcb7bb 100644
--- a/Features/SmartHome/SmartHome.py
+++ b/Features/SmartHome/SmartHome.py
@@ -33,7 +33,7 @@ class SmartHome(Command):
     radio = radio
     send_queue = []
 
-    def start(this, string):                    #   main method
+    def start(self, string):                    #   main method
         pass
 
     @staticmethod
diff --git a/Features/Zieit/Zieit.py b/Features/Zieit/Zieit.py
index e46b53b..e82ccb3 100644
--- a/Features/Zieit/Zieit.py
+++ b/Features/Zieit/Zieit.py
@@ -10,7 +10,7 @@ class Zieit (Command):
     lessonsEndTime = ['09:15','10:45','12:25','13:55','15:25','17:05','18:35']
     weekdays = ["Неділя", "Понеділок", "Вівторок", "Середа", "Четвер", "П'ятниця", "Субота"]
 
-    def start(this, string):                    #   main method
+    def start(self, string):                    #   main method
         pass
 
     @classmethod
diff --git a/General/DataBase/DataBase.py b/General/DataBase/DataBase.py
index a501afc..f49c8af 100644
--- a/General/DataBase/DataBase.py
+++ b/General/DataBase/DataBase.py
@@ -3,12 +3,12 @@ from sqlite3 import Error
 import config
 
 def sqlite(func):
-    def wrapper(this, *args):
+    def wrapper(self, *args):
         result = None
         try:
             connect = sqlite3.connect(config.db_name)
             cursor  = connect.cursor()
-            result = func(this, cursor, *args)
+            result = func(self, cursor, *args)
             connect.commit()
         except Error as er:
             print('SQLite error: %s' % (' '.join(er.args)))
@@ -22,45 +22,45 @@ def sqlite(func):
 
 class DataBase:
     @sqlite
-    def __init__(this, cursor, table_name, columns = None):
-        this.table_name = table_name
-        if not cursor.execute(f'select * from sqlite_master WHERE type = "table" AND name = "{this.table_name}"').fetchall():
+    def __init__(self, cursor, table_name, columns = None):
+        self.table_name = table_name
+        if not cursor.execute(f'select * from sqlite_master WHERE type = "table" AND name = "{self.table_name}"').fetchall():
             if columns:
-                cursor.execute(f'create table if not exists {this.table_name}(id integer PRIMARY KEY, {", ".join(columns)})')
-                this.columns = ['id',]+columns
+                cursor.execute(f'create table if not exists {self.table_name}(id integer PRIMARY KEY, {", ".join(columns)})')
+                self.columns = ['id',]+columns
         else:
-            this.columns = [properties[1] for properties in cursor.execute(f'pragma table_info({this.table_name})').fetchall()]
+            self.columns = [properties[1] for properties in cursor.execute(f'pragma table_info({self.table_name})').fetchall()]
 
 
     @sqlite
-    def all(this, cursor):
-        rows = cursor.execute(f'select * from {this.table_name}').fetchall()
+    def all(self, cursor):
+        rows = cursor.execute(f'select * from {self.table_name}').fetchall()
         data = []
         for row in rows:
             dict = {}
             for i, value in enumerate(row):
-                dict[this.columns[i]] = value
+                dict[self.columns[i]] = value
             data.append(dict)
         return data
 
     @sqlite
-    def where(this, cursor, condition):
-        return cursor.execute(f'select * from {this.table_name} where {condition}')
+    def where(self, cursor, condition):
+        return cursor.execute(f'select * from {self.table_name} where {condition}')
 
     @sqlite
-    def count(this, count):
-        return len(this.all())
+    def count(self, count):
+        return len(self.all())
 
     @sqlite
-    def update(this, cursor, values, where):
+    def update(self, cursor, values, where):
         updates = " ".join([f'{key} = "{value}"' for key, value in values.items()])
-        cursor.execute(f'update {this.table_name} set {updates} where {where}')
+        cursor.execute(f'update {self.table_name} set {updates} where {where}')
 
     @sqlite
-    def insert(this, cursor, values):
+    def insert(self, cursor, values):
         values = ['"'+v+'"' for v in values]
-        cursor.execute(f'insert into {this.table_name}({", ".join(this.columns[1:])}) values({", ".join(values)})')
+        cursor.execute(f'insert into {self.table_name}({", ".join(self.columns[1:])}) values({", ".join(values)})')
 
     @sqlite
-    def drop(this, cursor):
-        cursor.execute(f'drop table if exists {this.table_name}')
+    def drop(self, cursor):
+        cursor.execute(f'drop table if exists {self.table_name}')
diff --git a/General/SpeechRecognition/SpeechRecognition.py b/General/SpeechRecognition/SpeechRecognition.py
index 88ddcf0..e015972 100644
--- a/General/SpeechRecognition/SpeechRecognition.py
+++ b/General/SpeechRecognition/SpeechRecognition.py
@@ -5,31 +5,31 @@ import config
 #m = sr.Microphone(device_index=config.device_index)
 
 class SpeechToText:
-    def __init__(this, device = config.device_index, language = config.language_code):
-        this.device     = device
-        this.language   = language
-        this.m          = sr.Microphone(device_index = this.device)
-        this.r          = sr.Recognizer()
-        this.r.pause_threshold          = config.pause_threshold
-        this.r.energy_threshold         = config.energy_threshold
-        this.r.dynamic_energy_threshold = config.dynamic_energy_threshold
-        this.r.non_speaking_duration    = config.non_speaking_duration
+    def __init__(self, device = config.device_index, language = config.language_code):
+        self.device     = device
+        self.language   = language
+        self.m          = sr.Microphone(device_index = self.device)
+        self.r          = sr.Recognizer()
+        self.r.pause_threshold          = config.pause_threshold
+        self.r.energy_threshold         = config.energy_threshold
+        self.r.dynamic_energy_threshold = config.dynamic_energy_threshold
+        self.r.non_speaking_duration    = config.non_speaking_duration
 
-    def listen(this):
+    def listen(self):
         try:
-            with this.m as source:
-                audio = this.r.listen(source)
+            with self.m as source:
+                audio = self.r.listen(source)
         except:
             return ''
         try:
-            responce = {'text': this.r.recognize_google(audio, language = this.language).lower(), 'status': 'ok'}
+            responce = {'text': self.r.recognize_google(audio, language = self.language).lower(), 'status': 'ok'}
         except sr.UnknownValueError:
             responce = {'text': None, 'status': 'void'}
         except sr.RequestError:
             responce = {'text': None, 'status': 'error'}
         return responce
 
-    def recognize(this, speech):
+    def recognize(self, speech):
         with sr.AudioFile(speech.getPath()) as source:
             audio = r.record(source)
         try:
@@ -37,10 +37,10 @@ class SpeechToText:
         except:
             return ''
 
-    def listen_noise(this):
-        with this.m as source:
-            this.r.adjust_for_ambient_noise(source)
+    def listen_noise(self):
+        with self.m as source:
+            self.r.adjust_for_ambient_noise(source)
 
-    def set_device(this, index):
-        this.device = 1
-        this.m = sr.Microphone(device_index = this.device)
+    def set_device(self, index):
+        self.device = 1
+        self.m = sr.Microphone(device_index = self.device)
diff --git a/General/Text2Speech/TTS.py b/General/Text2Speech/TTS.py
index e942bc5..c3e2346 100644
--- a/General/Text2Speech/TTS.py
+++ b/General/Text2Speech/TTS.py
@@ -7,16 +7,16 @@ import config
 
 class Speech:
     _list = []
-    def __init__(this, text, voice, path, standart = False):
-        this._text      = text
-        this._voice     = voice
-        this._path      = path
-        this._standart  = standart
-        if(standart): Speech.append(this)
+    def __init__(self, text, voice, path, standart = False):
+        self._text      = text
+        self._voice     = voice
+        self._path      = path
+        self._standart  = standart
+        if(standart): Speech.append(self)
 
-    def speak(this):
-        if( os.path.exists(this._path) ):
-            with open(this._path) as f:
+    def speak(self):
+        if( os.path.exists(self._path) ):
+            with open(self._path) as f:
                 with mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) as audio:
                     mixer.init()
                     mixer.music.load(audio)
@@ -24,13 +24,13 @@ class Speech:
                     mixer.music.play()
                     while mixer.music.get_busy():
                         sleep(0.1)
-            if(not this._standart): os.remove(this._path)
+            if(not self._standart): os.remove(self._path)
 
-    def getBytes(this):
-        return open(this._path, 'rb')
+    def getBytes(self):
+        return open(self._path, 'rb')
 
-    def getPath(this):
-        return this._path
+    def getPath(self):
+        return self._path
 
     @staticmethod
     def append(obj):
@@ -41,15 +41,15 @@ class Speech:
         return Speech._list
 
 class Engine:
-    def __init__(this, name = 'ru-RU-Wavenet-B', language_code = config.language_code):
+    def __init__(self, name = 'ru-RU-Wavenet-B', language_code = config.language_code):
         os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = config.goole_tts_json_key
-        this._client       = texttospeech.TextToSpeechClient()
-        this._audio_config = texttospeech.AudioConfig( audio_encoding = texttospeech.AudioEncoding.MP3 )
-        this._language_code= language_code
-        this._name         = name
-        this._voice        = texttospeech.VoiceSelectionParams(
-            language_code  = this._language_code,
-            name           = this._name,
+        self._client       = texttospeech.TextToSpeechClient()
+        self._audio_config = texttospeech.AudioConfig( audio_encoding = texttospeech.AudioEncoding.MP3 )
+        self._language_code= language_code
+        self._name         = name
+        self._voice        = texttospeech.VoiceSelectionParams(
+            language_code  = self._language_code,
+            name           = self._name,
             ssml_gender    = texttospeech.SsmlVoiceGender.FEMALE)
 
     @staticmethod
@@ -67,16 +67,16 @@ class Engine:
             else: name = name.replace(letter, '_')
         return name
 
-    def generate(this, text, standart = False):
-        dir             = f'audio/{this._name}'
+    def generate(self, text, standart = False):
+        dir             = f'audio/{self._name}'
         path            = f'{dir}/{Engine.transliterate(text)[:100]}.mp3'
-        if( os.path.exists(path) ): return Speech(text, this._name, path, standart)
+        if( os.path.exists(path) ): return Speech(text, self._name, path, standart)
         synthesis_input = texttospeech.SynthesisInput(text=text)
         try:
-            response        = this._client.synthesize_speech(input = synthesis_input, voice = this._voice, audio_config = this._audio_config)
+            response        = self._client.synthesize_speech(input = synthesis_input, voice = self._voice, audio_config = self._audio_config)
             if not os.path.exists(dir): os.makedirs(dir)
             with open(path, 'wb') as out:
                 out.write(response.audio_content)
         except:
             print("[ERROR] TTS Error: google cloud tts response error. Check Cloud Platform Console")
-        return Speech(text, this._name, path, standart)
+        return Speech(text, self._name, path, standart)
diff --git a/helper.py b/helper.py
index d4cff74..34353e1 100644
--- a/helper.py
+++ b/helper.py
@@ -5,7 +5,7 @@ def getClass(name):
 from Command import Command                     #   import parent class
 
 class {name} (Command):
-    def start(this, string):                    #   main method
+    def start(self, string):                    #   main method
         pass
     '''
     return str.strip()
diff --git a/start.py b/start.py
index 37f14d8..90797cf 100644
--- a/start.py
+++ b/start.py
@@ -9,5 +9,5 @@ import Features
 # start oll controls in own thread or subprocess:
 # voice assistant, telegram bot, django(api and ui)
 
-#Controls.TelegramBot().start()
-Controls.VoiceAssistant().start()
+Controls.TelegramBot().start()
+#Controls.VoiceAssistant().start()