From 762334f4a438abb36ba1fa51fe693575cbef6f2f Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Tue, 19 Feb 2019 06:59:37 +0200
Subject: [PATCH 1/8] adding functools.wraps for decorator task

---
 Lesson6FilesDecorators/DecoratorTask1.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Lesson6FilesDecorators/DecoratorTask1.py b/Lesson6FilesDecorators/DecoratorTask1.py
index 55d1161..e2cd18c 100644
--- a/Lesson6FilesDecorators/DecoratorTask1.py
+++ b/Lesson6FilesDecorators/DecoratorTask1.py
@@ -1,8 +1,10 @@
 # Задача-3 - не обязательна к выполнению
 # Написать декоратор который будет подавлять ошибки возникающие в теле вашей функции.
 
+import functools
 
 def suppress_err(func):
+    @functools.wraps(func)
     def wrapper():
         try:
             func()

From d03be251f746f51b9c1293e255e6ec544940c3e3 Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Sun, 24 Feb 2019 20:21:15 +0200
Subject: [PATCH 2/8] First task was completed

---
 Lesson8ContexMan/Task1.py             | 33 ++++++++++++++++++--------
 Lesson8ContexMan/Task2.py             |  4 ++++
 Lesson8ContexMan/TaskExcOnPractice.py | 34 +++++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 10 deletions(-)
 create mode 100644 Lesson8ContexMan/Task2.py
 create mode 100644 Lesson8ContexMan/TaskExcOnPractice.py

diff --git a/Lesson8ContexMan/Task1.py b/Lesson8ContexMan/Task1.py
index 86baec8..196bdbf 100644
--- a/Lesson8ContexMan/Task1.py
+++ b/Lesson8ContexMan/Task1.py
@@ -2,17 +2,30 @@
 #  в папку которую он принимает на вход.
 # Так же ваш объект должен принимать исключение которое он будет подавлять.
 # Если флаг об исключении отсутствует, исключение должно быть поднято.
-#
 
 
-#Нужно написать класс, который будет собирать информацию о погоде в регионе.
-# API вы найдете на https://darksky.net/.
-# Вам нужно сделать запрос на один из API представленныx в документации.
-#  Ваша задача подумать над тем как будет устроен ваш класс,
-# какие методы он будет включать, где и как вы будете
-# конфигурировать API, хранить ключ, обрабатывать респонс
+import os
 
-import request
 
-class WeatherClass(object):
-    pass
\ No newline at end of file
+class ManageCont:
+    def __init__(self, path, excep, is_suppress=False):
+        self.path = path
+        self.saved_cwd = None # to save current dir
+        self.excep = excep
+        self.is_suppress = is_suppress
+
+    def __enter__(self):
+        self.saved_cwd = os.getcwd()
+        try:
+            os.chdir(self.path)
+        except FileNotFoundError:
+            print("Path '{}' is not correct.".format(self.path))
+
+    def __exit__(self, *exc_info):
+        os.chdir(self.saved_cwd)
+        return self.is_suppress
+
+
+with ManageCont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError, is_suppress=True):
+    raise KeyError
+
diff --git a/Lesson8ContexMan/Task2.py b/Lesson8ContexMan/Task2.py
new file mode 100644
index 0000000..724ac0e
--- /dev/null
+++ b/Lesson8ContexMan/Task2.py
@@ -0,0 +1,4 @@
+#Задача -2
+# Описать задачу выше но уже с использованием @contexmanager
+
+
diff --git a/Lesson8ContexMan/TaskExcOnPractice.py b/Lesson8ContexMan/TaskExcOnPractice.py
new file mode 100644
index 0000000..e02220b
--- /dev/null
+++ b/Lesson8ContexMan/TaskExcOnPractice.py
@@ -0,0 +1,34 @@
+#Определить свой класс Exception
+# который будет записывать месседж ошибки в файл.
+# Тоесть при возникновении ошибки
+# вам нужно писать ее в файл а не выводить.
+# Как пример вызова вашего функционала используйте пример ниже:
+
+#try:
+#     some_func()
+# except FormatError as exc:
+#     exc.logerror()
+
+
+class SomeError(Exception):
+
+    def __init__(self, line, file):
+        # line, file - where is exception was happened
+        self.line = line
+        self.file = file
+
+    def write_log_to_file(self, logfile='file.txt'):
+        with open(logfile, 'a') as log_f:
+            log_f.write("Error at file {} in {}", self.file, self.line, file =log)
+
+
+def test_func():
+    raise SomeError(40, "compas.txt")
+
+
+try:
+    test_func()
+except SomeError as exc:
+    exc.write_log_to_file()
+
+

From 7b189a7e7874f0c4d715c179d7bd323786861f17 Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Sun, 24 Feb 2019 21:47:01 +0200
Subject: [PATCH 3/8] Second and third tasks were completed, but  I have the
 questions

---
 Lesson8ContexMan/Task1.py      |  2 +-
 Lesson8ContexMan/Task2.py      | 27 +++++++++++++++++++++++++++
 Lesson8ContexMan/Task3_Time.py | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 Lesson8ContexMan/Task3_Time.py

diff --git a/Lesson8ContexMan/Task1.py b/Lesson8ContexMan/Task1.py
index 196bdbf..c4de2f9 100644
--- a/Lesson8ContexMan/Task1.py
+++ b/Lesson8ContexMan/Task1.py
@@ -10,7 +10,7 @@
 class ManageCont:
     def __init__(self, path, excep, is_suppress=False):
         self.path = path
-        self.saved_cwd = None # to save current dir
+        self.saved_cwd = None  # to save current dir
         self.excep = excep
         self.is_suppress = is_suppress
 
diff --git a/Lesson8ContexMan/Task2.py b/Lesson8ContexMan/Task2.py
index 724ac0e..da9b42b 100644
--- a/Lesson8ContexMan/Task2.py
+++ b/Lesson8ContexMan/Task2.py
@@ -1,4 +1,31 @@
 #Задача -2
+#Создать объект менеджера контекста который будет переходить
+#  в папку которую он принимает на вход.
+# Так же ваш объект должен принимать исключение которое он будет подавлять.
+# Если флаг об исключении отсутствует, исключение должно быть поднято.
 # Описать задачу выше но уже с использованием @contexmanager
 
+import os
+import contextlib
+
+
+@contextlib.contextmanager
+def manage_cont(path,excep):
+    saved_cwd = os.getcwd()
+    try:
+        os.chdir(path)
+    except FileNotFoundError:
+        print("Path '{}' is not correct.".format(path))
+    try:
+        yield {}
+    except excep as e:
+        print("error: {}".format(e))
+    finally:
+        os.chdir(saved_cwd)
+        return excep
+
+
+with manage_cont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError) as mc:
+    raise KeyError
+
 
diff --git a/Lesson8ContexMan/Task3_Time.py b/Lesson8ContexMan/Task3_Time.py
new file mode 100644
index 0000000..f4397d7
--- /dev/null
+++ b/Lesson8ContexMan/Task3_Time.py
@@ -0,0 +1,33 @@
+
+# Задача -3
+# Создать менеджер контекста который будет подсчитывать время выполняния блока инсрукций
+
+import time
+import os
+
+
+class ManageCont:
+    def __init__(self, path, excep, is_suppress=False):
+        self.path = path
+        self.saved_cwd = None  # to save current dir
+        self.excep = excep
+        self.is_suppress = is_suppress
+        self.start_time = 0
+
+    def __enter__(self):
+        self.start_time = time.time()
+        self.saved_cwd = os.getcwd()
+        try:
+            os.chdir(self.path)
+        except FileNotFoundError:
+            print("Path '{}' is not correct.".format(self.path))
+
+    def __exit__(self, *exc_info):
+        os.chdir(self.saved_cwd)
+        print(time.time() - self.start_time)
+        return self.is_suppress
+
+
+with ManageCont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError, is_suppress=True):
+    raise KeyError
+

From 8c968fb516614303aff413da87582de55283ef55 Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Thu, 28 Feb 2019 23:59:20 +0200
Subject: [PATCH 4/8] All tasks were modified.

---
 Lesson8ContexMan/Task1.py      |  9 +++++----
 Lesson8ContexMan/Task2.py      | 17 +++++++++--------
 Lesson8ContexMan/Task3_Time.py |  5 +++--
 3 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/Lesson8ContexMan/Task1.py b/Lesson8ContexMan/Task1.py
index c4de2f9..2e9e325 100644
--- a/Lesson8ContexMan/Task1.py
+++ b/Lesson8ContexMan/Task1.py
@@ -1,4 +1,4 @@
-#Создать объект менеджера контекста который будет переходить
+# Создать объект менеджера контекста который будет переходить
 #  в папку которую он принимает на вход.
 # Так же ваш объект должен принимать исключение которое он будет подавлять.
 # Если флаг об исключении отсутствует, исключение должно быть поднято.
@@ -21,11 +21,12 @@ def __enter__(self):
         except FileNotFoundError:
             print("Path '{}' is not correct.".format(self.path))
 
-    def __exit__(self, *exc_info):
+    def __exit__(self, exc_type, exc_val, exc_tb):
         os.chdir(self.saved_cwd)
-        return self.is_suppress
+        if exc_type is not None and issubclass(exc_type, self.excep):
+            return self.is_suppress
 
 
-with ManageCont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError, is_suppress=True):
+with ManageCont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError):
     raise KeyError
 
diff --git a/Lesson8ContexMan/Task2.py b/Lesson8ContexMan/Task2.py
index da9b42b..78960de 100644
--- a/Lesson8ContexMan/Task2.py
+++ b/Lesson8ContexMan/Task2.py
@@ -10,22 +10,23 @@
 
 
 @contextlib.contextmanager
-def manage_cont(path,excep):
+def manage_cont(path, excep, is_suppress=False):
     saved_cwd = os.getcwd()
     try:
         os.chdir(path)
-    except FileNotFoundError:
-        print("Path '{}' is not correct.".format(path))
-    try:
         yield {}
-    except excep as e:
-        print("error: {}".format(e))
+    except excep:
+        print("Exception '{}' was raised".format(excep))
+
     finally:
         os.chdir(saved_cwd)
-        return excep
+        if is_suppress:
+            pass
+        else:
+            raise
 
 
-with manage_cont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError) as mc:
+with manage_cont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError,is_suppress=True) as mc:
     raise KeyError
 
 
diff --git a/Lesson8ContexMan/Task3_Time.py b/Lesson8ContexMan/Task3_Time.py
index f4397d7..0163c6f 100644
--- a/Lesson8ContexMan/Task3_Time.py
+++ b/Lesson8ContexMan/Task3_Time.py
@@ -22,10 +22,11 @@ def __enter__(self):
         except FileNotFoundError:
             print("Path '{}' is not correct.".format(self.path))
 
-    def __exit__(self, *exc_info):
+    def __exit__(self, exc_type, exc_val, exc_tb):
         os.chdir(self.saved_cwd)
         print(time.time() - self.start_time)
-        return self.is_suppress
+        if exc_type is not None and issubclass(exc_type, self.excep):
+            return self.is_suppress
 
 
 with ManageCont(path="/Users/stas/PycharmProjects/PythonHomeworkDombrovskyi/", excep=KeyError, is_suppress=True):

From e5b7881252fe85d88c663004a9b09ef7b30b62bf Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Sun, 3 Mar 2019 10:36:10 +0200
Subject: [PATCH 5/8] First task was finished

---
 Homework9Descriptor/PracticeTasks.py | 24 +++++++++++++++++++++
 Homework9Descriptor/Task1.py         | 31 ++++++++++++++++++++++++++++
 Homework9Descriptor/__init__.py      |  0
 3 files changed, 55 insertions(+)
 create mode 100644 Homework9Descriptor/PracticeTasks.py
 create mode 100644 Homework9Descriptor/Task1.py
 create mode 100644 Homework9Descriptor/__init__.py

diff --git a/Homework9Descriptor/PracticeTasks.py b/Homework9Descriptor/PracticeTasks.py
new file mode 100644
index 0000000..1426cf3
--- /dev/null
+++ b/Homework9Descriptor/PracticeTasks.py
@@ -0,0 +1,24 @@
+
+class Kilometers:
+
+    def __get__(self, instance, owner):
+        return instance.m/1000
+
+    def __set__(self, instance, value):
+        instance.m =value/1000
+
+
+class Distance:
+    kilometers = Kilometers()
+
+    def __init__(self, m):
+        self.m = m
+
+
+distance = Distance(1200)
+
+print(distance.kilometers)
+print(distance.m)
+
+distance.m = 2200
+print(distance.kilometers)
\ No newline at end of file
diff --git a/Homework9Descriptor/Task1.py b/Homework9Descriptor/Task1.py
new file mode 100644
index 0000000..4893c1c
--- /dev/null
+++ b/Homework9Descriptor/Task1.py
@@ -0,0 +1,31 @@
+# Задача-1
+# Реализовать дескриптор валидации для аттрибута email.
+# Ваш дескриптор должен проверять формат email который вы пытаетесь назначить
+
+import re
+
+
+class EmailDescriptor:
+
+    def __init__(self, name="variable"):
+        self.name = name
+
+    def __get__(self, instance, owner):
+        return instance.name
+
+    def __set__(self, instance, value):
+        if re.fullmatch("[\w-]+@[\w-]+\.[\w-]+", value):
+            instance.name = value
+        else:
+            raise ValueError("it's not a valid email. Please, enter a valid email")
+
+
+class MyClass:
+    email = EmailDescriptor()
+
+
+my_class = MyClass()
+# my_class.email = "valid-email@gmail.com"
+# print(my_class.email)
+# my_class.email = "novalidemail"
+
diff --git a/Homework9Descriptor/__init__.py b/Homework9Descriptor/__init__.py
new file mode 100644
index 0000000..e69de29

From 74fc7fd0e7b331b5b20fd35caa2bfe5369a95c4b Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Sun, 3 Mar 2019 13:21:20 +0200
Subject: [PATCH 6/8] Small changes in the first task

---
 Homework9Descriptor/Task1.py          |  2 +-
 Homework9Descriptor/Task3MetaClass.py | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 Homework9Descriptor/Task3MetaClass.py

diff --git a/Homework9Descriptor/Task1.py b/Homework9Descriptor/Task1.py
index 4893c1c..296564b 100644
--- a/Homework9Descriptor/Task1.py
+++ b/Homework9Descriptor/Task1.py
@@ -14,7 +14,7 @@ def __get__(self, instance, owner):
         return instance.name
 
     def __set__(self, instance, value):
-        if re.fullmatch("[\w-]+@[\w-]+\.[\w-]+", value):
+        if re.fullmatch("[\.\w-]+@[\.\w-]+", value):
             instance.name = value
         else:
             raise ValueError("it's not a valid email. Please, enter a valid email")
diff --git a/Homework9Descriptor/Task3MetaClass.py b/Homework9Descriptor/Task3MetaClass.py
new file mode 100644
index 0000000..2cc0ab8
--- /dev/null
+++ b/Homework9Descriptor/Task3MetaClass.py
@@ -0,0 +1,17 @@
+# Задача-2
+# Реализовать синглтон метакласс(класс для создания классов синглтонов).
+
+class Singleton(type):
+
+    def __call__(cls, *args, **kwargs):
+        # your code here
+        pass
+
+
+class MyClass(metaclass=Singleton):
+    pass
+
+
+c = MyClass()
+b = MyClass()
+assert id(c) == id(b)
\ No newline at end of file

From c3cda4a6abbd4f5ec25f8a68ded33f901d5e835d Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Mon, 4 Mar 2019 23:34:17 +0200
Subject: [PATCH 7/8] Second task was finished

---
 Homework9Descriptor/Task1.py                  |  2 ++
 .../{Task3MetaClass.py => Task2MetaClass.py}  | 11 ++++++--
 Homework9Descriptor/Task3Descr2.py            | 28 +++++++++++++++++++
 3 files changed, 38 insertions(+), 3 deletions(-)
 rename Homework9Descriptor/{Task3MetaClass.py => Task2MetaClass.py} (56%)
 create mode 100644 Homework9Descriptor/Task3Descr2.py

diff --git a/Homework9Descriptor/Task1.py b/Homework9Descriptor/Task1.py
index 296564b..805f423 100644
--- a/Homework9Descriptor/Task1.py
+++ b/Homework9Descriptor/Task1.py
@@ -20,6 +20,7 @@ def __set__(self, instance, value):
             raise ValueError("it's not a valid email. Please, enter a valid email")
 
 
+
 class MyClass:
     email = EmailDescriptor()
 
@@ -29,3 +30,4 @@ class MyClass:
 # print(my_class.email)
 # my_class.email = "novalidemail"
 
+
diff --git a/Homework9Descriptor/Task3MetaClass.py b/Homework9Descriptor/Task2MetaClass.py
similarity index 56%
rename from Homework9Descriptor/Task3MetaClass.py
rename to Homework9Descriptor/Task2MetaClass.py
index 2cc0ab8..d4bc031 100644
--- a/Homework9Descriptor/Task3MetaClass.py
+++ b/Homework9Descriptor/Task2MetaClass.py
@@ -1,11 +1,14 @@
 # Задача-2
 # Реализовать синглтон метакласс(класс для создания классов синглтонов).
 
+
 class Singleton(type):
+    _instances = {}
 
     def __call__(cls, *args, **kwargs):
-        # your code here
-        pass
+        if cls not in cls._instances:
+            cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
+        return cls._instances[cls]
 
 
 class MyClass(metaclass=Singleton):
@@ -14,4 +17,6 @@ class MyClass(metaclass=Singleton):
 
 c = MyClass()
 b = MyClass()
-assert id(c) == id(b)
\ No newline at end of file
+assert id(c) == id(b)
+# print(id(c))
+# print(id(b))
diff --git a/Homework9Descriptor/Task3Descr2.py b/Homework9Descriptor/Task3Descr2.py
new file mode 100644
index 0000000..a7067e2
--- /dev/null
+++ b/Homework9Descriptor/Task3Descr2.py
@@ -0,0 +1,28 @@
+# Задача-3
+# реализовать дескриптор IngegerField(), который будет хранить уникальные
+# состояния для каждого класса где он объявлен
+
+
+class IngegerField:
+    instances = {}
+    def __init__(self, value):
+        self.instances[self,None] = value
+
+    def __get__(self, instance, owner):
+        return self.instances[self,owner]
+
+    def __set__(self, instance, value):
+        self.instances[self,owner] = value
+
+
+class Data:
+    number = IngegerField()
+
+
+data_row = Data()
+new_data_row = Data()
+
+data_row.number = 5
+new_data_row.number = 10
+
+# assert data_row.number != new_data_row.number

From 60271bec86ccef0772ed5f482054eaa1301b4a3f Mon Sep 17 00:00:00 2001
From: stasDomb <salsafollower@gmail.com>
Date: Sun, 10 Mar 2019 21:43:59 +0200
Subject: [PATCH 8/8] Third task of homework9 was finished

---
 Homework9Descriptor/Task3Descr2.py | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/Homework9Descriptor/Task3Descr2.py b/Homework9Descriptor/Task3Descr2.py
index a7067e2..14bee73 100644
--- a/Homework9Descriptor/Task3Descr2.py
+++ b/Homework9Descriptor/Task3Descr2.py
@@ -5,14 +5,15 @@
 
 class IngegerField:
     instances = {}
-    def __init__(self, value):
-        self.instances[self,None] = value
+
+    def __init__(self, value=None):
+        self.instances[self] = value
 
     def __get__(self, instance, owner):
-        return self.instances[self,owner]
+        return self.instances[self, instance]
 
     def __set__(self, instance, value):
-        self.instances[self,owner] = value
+        self.instances[self, instance] = value
 
 
 class Data:
@@ -25,4 +26,4 @@ class Data:
 data_row.number = 5
 new_data_row.number = 10
 
-# assert data_row.number != new_data_row.number
+assert data_row.number != new_data_row.number