Added lesson 14 solutions

students/swietczak_monika/lesson_14_decorators/authorization.py

@@ -0,0 +1,14 @@
+access_count = -1
+
+
+def has_access():
+    """
+    let's pretend this function calls some authorization services
+    returns True if access is granted and False if not
+    access is granted every 3rd time
+    """
+    global access_count
+    access_count += 1
+    if access_count >= 3:
+        access_count = 0
+    return access_count == 0

students/swietczak_monika/lesson_14_decorators/exercise1.py

@@ -0,0 +1,13 @@
+def sort(some_function):
+    def sort_list():
+        return sorted(some_function())
+
+    return sort_list
+
+
+@sort
+def data_feeder():
+    return [4, 2, 1, 3]
+
+
+print(data_feeder() == [1, 2, 3, 4])  # <- this is True

students/swietczak_monika/lesson_14_decorators/exercise2.py

@@ -0,0 +1,20 @@
+import authorization
+
+
+def access_required(some_function):
+    def check_access(*args, **kwargs):
+        if authorization.has_access():
+            return some_function(*args, **kwargs)
+
+    return check_access
+
+
+@access_required
+def restricted_print(*args, **kwargs):
+    print(*args, **kwargs)
+
+
+restricted_print('1 - visible')
+restricted_print('2 - invisible')
+restricted_print('3 - invisible')
+restricted_print('4 - visible')

students/swietczak_monika/lesson_14_decorators/exercise3.py

@@ -0,0 +1,49 @@
+def logger_wrapper(foo, *args, **kwargs):
+    print("Args: ")
+    for arg in args:
+        print(str(arg))
+
+    print("Kwargs: ")
+    for key, value in kwargs.items():
+        print("{} : {}".format(key, value))
+
+    foo(*args, **kwargs)
+
+
+def logged(some_function):
+    def wrapper(*args, **kwargs):
+        # ("logger wrapper for function")
+        logger_wrapper(some_function, *args, **kwargs)
+
+        # print("Something after some_function() is called")
+
+    return wrapper
+
+
+@logged
+def just_some_function(*args, **kwargs):
+    print("Just some function with args: {}, kwargs: {}".format(args, kwargs))
+
+
+@logged
+def add_some_numbers(number_one, number_two):
+    print("Numbers added=", str(number_one + number_two))
+
+
+@logged
+def no_args_function():
+    print("No args function!")
+
+
+def main():
+    some_dict = {'c': 2, 'd': 3}
+    just_some_function("a", "b", **some_dict)
+    just_some_function("a", "b")
+    just_some_function(**some_dict)
+    just_some_function()
+    add_some_numbers(1, 2)
+    no_args_function()
+
+
+if __name__ == "__main__":
+    main()