sixth commit, refresher finished

Author: ArmoredStone

01_variables/code.py

@@ -15,4 +15,4 @@
 a = 5
 b = a
 print(f"a:{a}")
-print(f"b:{b}")
+print(f"b:{b}")

02_string_formatting/code.py

@@ -7,4 +7,4 @@
 name = "Alice"
 print(greeting_format.format(name))
 
-print("{} {}".format("Hello", "Alice"))
+print("{} {}".format("Hello", "Alice"))

03_user_input/code.py

@@ -4,4 +4,4 @@
 
 size = input("What is your shoe size? ")
 american_size = int(size) - 30
-print(f"Your American shoe size is {american_size}.")
+print(f"Your American shoe size is {american_size}.")

05_collections/advanced_set_operations.py

@@ -0,0 +1,14 @@
+friends = {"A", "B", "C"}
+abroad = {"A", "C"}
+
+local = friends.difference(abroad)
+abroad = abroad.difference(friends)
+friends = friends.union(abroad)
+print(friends)
+print(local)
+print(abroad)
+
+both = friends.intersection(abroad)
+not_both = friends.symmetric_difference(abroad)
+print(both)
+print(not_both)

05_collections/code.py

@@ -1,4 +1,3 @@
-
 l = ["B", "E", "A"]
 t = ("C", "F", "X")
 s = {"O", "G", "H"}
@@ -8,19 +7,3 @@
 print(l, type(l))
 print(t, type(t))
 print(s, type(s))
-
-
-friends = {"A", "B", "C"}
-abroad = {"A", "C"}
-
-local = friends.difference(abroad)
-abroad = abroad.difference(friends)
-friends = friends.union(abroad)
-print(friends)
-print(local)
-print(abroad)
-
-both = friends.intersection(abroad)
-not_both = friends.symmetric_difference(abroad)
-print(both)
-print(not_both)

06_booleans/code.py

@@ -10,3 +10,6 @@
 print(a == b)
 print(a is b)
 print(c is b)
+print(True or False)
+print(True and False)
+print(not True)

09_in_in_if/code.py

@@ -7,4 +7,4 @@
 elif int(user) in [number - 1, number + 1]:
     print("You were close!")
 else:
-    print("You guessed it wrong!")
+    print("You guessed it wrong!")

12_dicts/code.py

@@ -1,4 +1,5 @@
 friend_ages = {"Rolf": 24, "Adam": 30, "Anne": 27}
+
 try:
     print(friend_ages["Rolf"])
     print(friend_ages["Bob"])
@@ -12,7 +13,9 @@
     {"name": "Adam", "age": 30},
     {"name": "Anne", "age": 27}
 ]
+
 agesum = 0
+
 for friend in friends:
     agesum += friend["age"]
     for k,v in friend.items():

13_destructing_variables/code.py

@@ -1,8 +1,8 @@
 x = (5, 11)
-y = 5, 11
+y = [5, 11]
 z = [(5, 11)]
 
-f, g = x
+f, g = y
 
 print(type(x))
 print(type(y))
@@ -29,8 +29,8 @@
 
 numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 
-head, head2, *tail = numbers
+*rest, head1, head2 = numbers
 
-print(head)
+print(rest)
+print(head1)
 print(head2)
-print(tail)

35_at_syntax_decorators/code.py

@@ -0,0 +1,18 @@
+import functools
+
+user = {"access_level": "admin"}
+
+def make_secure(func):
+    # @functools.wraps(func)
+    def secure_function():
+        if user["access_level"] == "admin":
+            return func()
+        else:
+            return f"No admin permissions for {user['access_level']}"
+    return secure_function
+
+@make_secure
+def get_admin_password():
+    return "1234"
+
+print(get_admin_password.__name__)  # 1234

36_parameter_decorators/code.py

@@ -0,0 +1,22 @@
+import functools
+
+user1 = {"name":"Josh","access_level": "admin"}
+user2 = {"name":"Diana","access_level": "user"}
+
+def make_secure(func):
+    @functools.wraps(func)
+    def secure_function(*args, **kwargs):
+        user_temp = args[0]
+        if user_temp["access_level"] == "admin":
+            return func(*args, **kwargs)
+        else:
+            return f"User {user_temp['name']} {user_temp['access_level']} doesn't have the admin access level."
+    return secure_function
+
+@make_secure
+def get_admin_password(user: dict = {"name":"guest","access_level": "guest"}):
+    return user["name"]+" 1234"
+
+print(get_admin_password(user1))  # 1234
+print(get_admin_password(user2))  # User Diana doesn't have the admin access level.
+

37_decorators_with_parameters/code.py

@@ -0,0 +1,35 @@
+import functools
+
+user1 = {"name":"Josh","access_level": "admin", "password": "1234"}
+user2 = {"name":"Diana","access_level": "user", "password": "4321"}
+
+def make_secure(access_level):
+    def decorator(func):
+        @functools.wraps(func)
+        def secure_function(*args, **kwargs):
+            if args:
+                user_temp = args[0]
+                if user_temp["access_level"] == access_level or user_temp["access_level"] == "admin":
+                    return func(*args, **kwargs)
+                else:
+                    return f"User {user_temp['name']} doesn't have the {access_level} access level."
+            else:
+                return f"Guest access is not allowed."
+        return secure_function
+    return decorator
+    
+@make_secure("admin")
+def get_admin_password(user: dict):
+    return user["name"]+user["password"]
+
+@make_secure("user")
+def get_user_password(user: dict):
+    return user["name"]+user["password"]
+
+
+
+print(get_admin_password(user1))
+print(get_admin_password(user2))
+
+print(get_user_password(user1))
+print(get_user_password(user2))

38_mutability/code.py

@@ -0,0 +1,14 @@
+a = []
+b = a
+c = []
+
+print(id(a))
+print(id(b))
+print(id(c))
+
+print(a is b)
+a.append(35)
+c.append(35)
+print(a)
+print(b)
+print(c)

39_mutabile_parameters/code.py

@@ -0,0 +1,35 @@
+from typing import List, Optional
+
+class Student:
+    def __init__(self, name: str, grades: Optional[List[int]] = None):
+        self.name = name
+        self.grades = grades or []
+    
+    def take_exam(self, result: int) -> None:
+        self.grades.append(result)
+
+class StudentNotRecommended:
+    def __init__(self, name: str, grades: List[int] = []):
+        self.name = name
+        self.grades = grades
+    
+    def take_exam(self, result: int) -> None:
+        self.grades.append(result)
+
+bob1 = StudentNotRecommended("Bob")
+bob1.take_exam(85)
+grace2 = StudentNotRecommended("Grace")
+
+print(id(bob1.grades))
+print(id(grace2.grades))
+
+print(grace2.grades)
+print(bob1.grades)
+
+bob = Student("Bob")
+bob.take_exam(85)
+grace = Student("Grace")
+print(id(bob.grades))
+print(id(grace.grades))
+print(grace.grades)
+print(bob.grades)