diff --git a/abonapp/forms.py b/abonapp/forms.py
index 1666c8a..b9e11d4 100644
--- a/abonapp/forms.py
+++ b/abonapp/forms.py
@@ -70,7 +70,7 @@ class AbonForm(forms.ModelForm):
 
     def save(self, commit=True):
         raw_password = self.cleaned_data['password']
-        acc = super().save(commit=False)
+        acc = super(AbonForm, self).save(commit=False)
         acc.password = make_password(raw_password)
         if commit:
             acc.save()
diff --git a/abonapp/models.py b/abonapp/models.py
index 9b79aa9..ce737ea 100644
--- a/abonapp/models.py
+++ b/abonapp/models.py
@@ -164,7 +164,8 @@ class Abon(UserProfile):
 
     # покупаем тариф
     def pick_tariff(self, tariff, author, comment=None, deadline=None):
-        assert isinstance(tariff, Tariff)
+        if not isinstance(tariff, Tariff):
+            raise TypeError
 
         amount = round(tariff.amount, 2)
 
diff --git a/agent/mod_mikrotik.py b/agent/mod_mikrotik.py
index 1924b14..103331f 100644
--- a/agent/mod_mikrotik.py
+++ b/agent/mod_mikrotik.py
@@ -161,7 +161,8 @@ class TransmitterManager(BaseTransmitter, metaclass=ABCMeta):
             self.s.close()
 
     def _exec_cmd(self, cmd):
-        assert isinstance(cmd, list)
+        if not isinstance(cmd, list):
+            raise TypeError
         result_iter = self.ar.talk_iter(cmd)
         res = []
         for rt in result_iter:
@@ -171,7 +172,8 @@ class TransmitterManager(BaseTransmitter, metaclass=ABCMeta):
         return res
 
     def _exec_cmd_iter(self, cmd):
-        assert isinstance(cmd, list)
+        if not isinstance(cmd, list):
+            raise TypeError
         result_iter = self.ar.talk_iter(cmd)
         for rt in result_iter:
             if len(rt) < 2:
@@ -223,7 +225,8 @@ class QueueManager(TransmitterManager, metaclass=ABCMeta):
             return self._build_shape_obj(ret[0])
 
     def add(self, user):
-        assert isinstance(user, AbonStruct)
+        if not isinstance(user, AbonStruct):
+            raise TypeError
         if user.tariff is None or not isinstance(user.tariff, TariffStruct):
             return
         return self._exec_cmd(['/queue/simple/add',
@@ -236,7 +239,8 @@ class QueueManager(TransmitterManager, metaclass=ABCMeta):
                                ])
 
     def remove(self, user):
-        assert isinstance(user, AbonStruct)
+        if not isinstance(user, AbonStruct):
+            raise TypeError
         q = self.find('uid%d' % user.uid)
         if q is not None:
             return self._exec_cmd(['/queue/simple/remove', '=.id=' + getattr(q, 'queue_id', '')])
@@ -246,7 +250,8 @@ class QueueManager(TransmitterManager, metaclass=ABCMeta):
             return self._exec_cmd(['/queue/simple/remove', '=numbers=' + ','.join(q_ids)])
 
     def update(self, user):
-        assert isinstance(user, AbonStruct)
+        if not isinstance(user, AbonStruct):
+            raise TypeError
         if user.tariff is None or not isinstance(user.tariff, TariffStruct):
             return
         queue = self.find('uid%d' % user.uid)
@@ -282,7 +287,8 @@ class QueueManager(TransmitterManager, metaclass=ABCMeta):
             yield int(queue[1]['=.id'].replace('*', ''), base=16)
 
     def disable(self, user):
-        assert isinstance(user, AbonStruct)
+        if not isinstance(user, AbonStruct):
+            raise TypeError
         q = self.find('uid%d' % user.uid)
         if q is None:
             self.add(user)
@@ -291,7 +297,8 @@ class QueueManager(TransmitterManager, metaclass=ABCMeta):
             return self._exec_cmd(['/queue/simple/disable', '=.id=*' + getattr(q, 'queue_id', '')])
 
     def enable(self, user):
-        assert isinstance(user, AbonStruct)
+        if not isinstance(user, AbonStruct):
+            raise TypeError
         q = self.find('uid%d' % user.uid)
         if q is None:
             self.add(user)
@@ -309,7 +316,8 @@ class IpAddressListObj(IpStruct):
 class IpAddressListManager(TransmitterManager, metaclass=ABCMeta):
 
     def add(self, list_name, ip, timeout=None):
-        assert isinstance(ip, IpStruct)
+        if not isinstance(ip, IpStruct):
+            raise TypeError
         commands = [
             '/ip/firewall/address-list/add',
             '=list=%s' % list_name,
@@ -342,7 +350,8 @@ class IpAddressListManager(TransmitterManager, metaclass=ABCMeta):
             ])
 
     def find(self, ip, list_name):
-        assert isinstance(ip, IpStruct)
+        if not isinstance(ip, IpStruct):
+            raise TypeError
         return self._exec_cmd([
             '/ip/firewall/address-list/print', 'where',
             '?list=%s' % list_name,
@@ -392,8 +401,9 @@ class MikrotikTransmitter(QueueManager, IpAddressListManager):
                 IpAddressListManager.remove(self, ip_list_entity[0]['=.id'])
 
     def add_user(self, user, ip_timeout=None):
-        super(MikrotikTransmitter, self).add_user(user)
-        assert isinstance(user.ip, IpStruct)
+        super(MikrotikTransmitter, self).add_user(user, ip_timeout)
+        if not isinstance(user.ip, IpStruct):
+            raise TypeError
         if user.tariff is None or not isinstance(user.tariff, TariffStruct):
             return
         QueueManager.add(self, user)
@@ -412,8 +422,9 @@ class MikrotikTransmitter(QueueManager, IpAddressListManager):
 
     # обновляем основную инфу абонента
     def update_user(self, user, ip_timeout=None):
-        super(MikrotikTransmitter, self).update_user(user)
-        assert isinstance(user.ip, IpStruct)
+        super(MikrotikTransmitter, self).update_user(user, ip_timeout)
+        if not isinstance(user.ip, IpStruct):
+            raise TypeError
 
         # ищем ip абонента в списке ip
         find_res = IpAddressListManager.find(self, user.ip, LIST_USERS_ALLOWED)
diff --git a/agent/structs.py b/agent/structs.py
index 849a296..e68a645 100644
--- a/agent/structs.py
+++ b/agent/structs.py
@@ -38,7 +38,8 @@ class IpStruct(BaseStruct):
         return self.__ip
 
     def __eq__(self, other):
-        assert isinstance(other, IpStruct)
+        if not isinstance(other, IpStruct):
+            raise TypeError('Instance must be IpStruct')
         return self.__ip == other.__ip
 
     def __int__(self):
@@ -100,8 +101,10 @@ class AbonStruct(BaseStruct):
     def serialize(self):
         if self.tariff is None:
             return
-        assert isinstance(self.tariff, TariffStruct)
-        assert isinstance(self.ip, IpStruct)
+        if not isinstance(self.tariff, TariffStruct):
+            raise TypeError('Instance must be TariffStruct')
+        if not isinstance(self.ip, IpStruct):
+            raise TypeError('Instance must be IpStruct')
         dt = pack("!LII?", self.uid, int(self.ip), self.tariff.tid, self.is_active)
         return dt
 
@@ -110,13 +113,15 @@ class AbonStruct(BaseStruct):
         self.uid = dt[0]
         self.ip = IpStruct(dt[1])
         if tariff is not None:
-            assert isinstance(tariff, TariffStruct)
+            if not isinstance(tariff, TariffStruct):
+                raise TypeError
             self.tariff = tariff
         self.is_active = dt['3']
         return self
 
     def __eq__(self, other):
-        assert isinstance(other, AbonStruct)
+        if not isinstance(other, AbonStruct):
+            raise TypeError
         r = self.uid == other.uid and self.ip == other.ip
         r = r and self.tariff == other.tariff
         return r
@@ -147,5 +152,6 @@ class ShapeItem(BaseStruct):
         return self
 
     def __eq__(self, other):
-        assert isinstance(other, ShapeItem)
+        if not isinstance(other, ShapeItem):
+            raise TypeError
         return self.sid == other.sid and self.abon == other.abon
diff --git a/chatbot/telebot.py b/chatbot/telebot.py
index 42e0ad5..160dc1a 100755
--- a/chatbot/telebot.py
+++ b/chatbot/telebot.py
@@ -31,7 +31,8 @@ class DjingTelebot(helper.ChatHandler):
 
     # задаём вопрос пользователю, и ожидаем ответ в fn
     def _question(self, text, fn):
-        assert isinstance(fn, collections.Callable)
+        if not isinstance(fn, collections.Callable):
+            raise TypeError
         self._dialog_fn = fn
         if text is not None:
             self._sent_reply(text)
@@ -75,7 +76,8 @@ class DjingTelebot(helper.ChatHandler):
         if text in list(self.cmds.keys()):
             self.cmds[text]()
         elif self._dialog_fn is not None:
-            assert callable(self._dialog_fn)
+            if not callable(self._dialog_fn):
+                raise TypeError
             self._dialog_fn(text)
             self._dialog_fn = None
         else:
@@ -92,7 +94,8 @@ class DjingTelebot(helper.ChatHandler):
             try:
                 TelegramBot.objects.get(user=profile)
             except TelegramBot.DoesNotExist:
-                assert self._chat_id != 0
+                if self._chat_id == 0:
+                    raise ChatException('telebot.py. def question_name: Chat id is empty')
                 TelegramBot.objects.create(
                     user=profile,
                     chat_id=self._chat_id
diff --git a/devapp/dev_types.py b/devapp/dev_types.py
index cf40a88..a61cfbd 100644
--- a/devapp/dev_types.py
+++ b/devapp/dev_types.py
@@ -9,7 +9,8 @@ class DLinkPort(BasePort):
 
     def __init__(self, num, name, status, mac, speed, snmpWorker):
         BasePort.__init__(self, num, name, status, mac, speed)
-        assert issubclass(snmpWorker.__class__ , SNMPBaseWorker)
+        if not issubclass(snmpWorker.__class__ , SNMPBaseWorker):
+            raise TypeError
         self.snmp_worker = snmpWorker
 
     # выключаем этот порт
@@ -79,7 +80,8 @@ class DLinkDevice(DevBase, SNMPBaseWorker):
 class ONUdev(BasePort):
     def __init__(self, num, name, status, mac, speed, signal, snmpWorker):
         super(ONUdev, self).__init__(num, name, status, mac, speed)
-        assert issubclass(snmpWorker.__class__, SNMPBaseWorker)
+        if not issubclass(snmpWorker.__class__, SNMPBaseWorker):
+            raise TypeError
         self.snmp_worker = snmpWorker
         self.signal = signal
 
@@ -181,7 +183,8 @@ class EltexPort(BasePort):
 
     def __init__(self, snmpWorker, *args, **kwargs):
         BasePort.__init__(self, *args, **kwargs)
-        assert issubclass(snmpWorker.__class__, SNMPBaseWorker)
+        if not issubclass(snmpWorker.__class__, SNMPBaseWorker):
+            raise TypeError
         self.snmp_worker = snmpWorker
 
     # выключаем этот порт
diff --git a/devapp/tests.py b/devapp/tests.py
index ee30280..ea6adf0 100644
--- a/devapp/tests.py
+++ b/devapp/tests.py
@@ -14,7 +14,8 @@ class DevTest(TestCase):
         ports = dev.get_ports()
         print('gports')
         for port in ports:
-            assert issubclass(port.__class__, dev_types.BasePort)
+            if not issubclass(port.__class__, dev_types.BasePort):
+                raise TypeError
             print(('\tPort:', port.nm, port.st, port.mac(), port.sp))
         # Disable 2 port
         print((ports[1].disable()))
diff --git a/docs/dev.md b/docs/dev.md
index c6c73e6..af79bb3 100644
--- a/docs/dev.md
+++ b/docs/dev.md
@@ -12,7 +12,8 @@ class EltexPort(BasePort):
 
     def __init__(self, snmpWorker, *args, **kwargs):
         BasePort.__init__(self, *args, **kwargs)
-        assert issubclass(snmpWorker.__class__, SNMPBaseWorker)
+        if not issubclass(snmpWorker.__class__, SNMPBaseWorker):
+            raise TypeError
         self.snmp_worker = snmpWorker
 
     # выключаем этот порт
diff --git a/mydefs.py b/mydefs.py
index 7eea08a..5bd45fa 100644
--- a/mydefs.py
+++ b/mydefs.py
@@ -83,8 +83,8 @@ class MyGenericIPAddressField(models.GenericIPAddressField):
         value = super(MyGenericIPAddressField, self).get_prep_value(value)
         return ip2int(value)
 
-    def to_python(self, addr):
-        return addr
+    def to_python(self, value):
+        return value
 
     def get_internal_type(self):
         return 'PositiveIntegerField'
diff --git a/photo_app/models.py b/photo_app/models.py
index 5f33500..abcd26f 100644
--- a/photo_app/models.py
+++ b/photo_app/models.py
@@ -27,7 +27,7 @@ class Photo(models.Model):
     def save(self, *args, **kwargs):
         if not self.image:
             return
-        super(Photo, self).save()
+        super(Photo, self).save(*args, **kwargs)
         im = Image.open(self.image.path)
         im.thumbnail((759, 759), Image.ANTIALIAS)
 
@@ -42,7 +42,7 @@ class Photo(models.Model):
         im.save(fname)
         os.remove(self.image.path)
         self.image = "%s.%s" % (hs, ext)
-        super(Photo, self).save()
+        super(Photo, self).save(*args, **kwargs)
 
         # class Meta:
         #    unique_together = (('image',),)
diff --git a/tariff_app/models.py b/tariff_app/models.py
index 0981537..464cf31 100644
--- a/tariff_app/models.py
+++ b/tariff_app/models.py
@@ -19,7 +19,8 @@ class Tariff(models.Model):
         ob = [TC for TC in TARIFF_CHOICES if TC[0] == self.calc_type]
         if len(ob) > 0:
             res_type = ob[0][1]
-            assert issubclass(res_type, TariffBase)
+            if not issubclass(res_type, TariffBase):
+                raise TypeError
             return res_type
 
     def calc_deadline(self):