Chapter 5

CodeMouse92 · CodeMouse92 · commit 1f8dc1cf1182 · 2022-05-15T21:44:49.000-05:00
diff --git a/Ch5/class_attributes.py b/Ch5/class_attributes.py
@@ -0,0 +1,13 @@
+class Nutrimatic:
+    output = "Something almost, but not quite, entirely unlike tea."
+
+    def request(self, beverage):
+        return self.output
+
+
+machine = Nutrimatic()
+mug = machine.request("Tea")
+print(mug)
+
+print(machine.output)
+print(Nutrimatic.output)
diff --git a/Ch5/coercion.py b/Ch5/coercion.py
@@ -0,0 +1,3 @@
+print(42.5)   # coerces to a string
+x = 5 + 1.5   # coerces to a float (6.5)
+y = 5 + True  # coerces to an int (6)...and is also considered a bad idea
diff --git a/Ch5/conversion.py b/Ch5/conversion.py
@@ -0,0 +1,6 @@
+life_universe_everything = "42"
+
+answer = float(life_universe_everything)
+
+print(type(answer))
+print(answer)
diff --git a/Ch5/duck_typing_feels_better.py b/Ch5/duck_typing_feels_better.py
@@ -0,0 +1,17 @@
+def calculate_age(birth_year, current_year):
+    return (current_year - birth_year)
+
+
+def calculate_third_age_year(current_age, current_year):
+    return int(current_year - (current_age / 3))
+
+
+birth_year = "1985"    # get from user, assume data validation
+birth_year = int(birth_year)
+
+current_year = "2010"  # get from system
+current_year = int(current_year)
+
+current_age = calculate_age(birth_year, current_year)
+third_age_year = calculate_third_age_year(current_age, current_year)
+print(third_age_year)
diff --git a/Ch5/evils_of_system_hungarian.py b/Ch5/evils_of_system_hungarian.py
@@ -0,0 +1,22 @@
+def calculate_age(intBirthYear, intCurrentYear):
+    intAge = intCurrentYear - intBirthYear
+    return intAge
+
+
+def calculate_third_age_year(intCurrentAge, intCurrentYear):
+    floatThirdAge = intCurrentAge / 3
+    floatCurrentYear = float(intCurrentYear)
+    floatThirdAgeYear = floatCurrentYear - floatThirdAge
+    intThirdAgeYear = int(floatThirdAgeYear)
+    return intThirdAgeYear
+
+
+strBirthYear = "1985"    # get from user, assume data validation
+intBirthYear = int(strBirthYear)
+
+strCurrentYear = "2010"  # get from system
+intCurrentYear = int(strCurrentYear)
+
+intCurrentAge = calculate_age(intBirthYear, intCurrentYear)
+intThirdAgeYear = calculate_third_age_year(intCurrentAge, intCurrentYear)
+print(intThirdAgeYear)
diff --git a/Ch5/global_scope.py b/Ch5/global_scope.py
@@ -0,0 +1,13 @@
+high_score = 10
+
+
+def score():
+    global high_score
+    new_score = 465             # SCORING LOGIC HERE
+    if new_score > high_score:
+        print("New high score")
+        high_score = new_score
+
+
+score()
+print(high_score)  # prints 465
diff --git a/Ch5/global_scope_gotcha.py b/Ch5/global_scope_gotcha.py
@@ -0,0 +1,11 @@
+current_score = 0
+
+
+def score():
+    global current_score
+    new_score = 465  # SCORING LOGIC HERE
+    current_score = new_score
+
+
+score()
+print(current_score)  # prints 465
diff --git a/Ch5/immutable_types.py b/Ch5/immutable_types.py
@@ -0,0 +1,7 @@
+eggs = 12
+carton = eggs
+print(eggs is carton)  # prints True
+eggs += 1
+print(eggs is carton)  # prints False
+print(eggs)            # prints 13
+print(carton)          # prints 12
diff --git a/Ch5/local_scope.py b/Ch5/local_scope.py
@@ -0,0 +1,16 @@
+def spam():
+    message = "Spam"
+    word = "spam"
+    for _ in range(100):
+        separator = ", "
+        message = separator + word
+    message += separator
+    message += "spam!"
+
+    return message
+
+
+# print(message)  # NameError: name 'message' is not defined
+
+output = spam()
+print(output)
diff --git a/Ch5/lowest_temp.py b/Ch5/lowest_temp.py
@@ -0,0 +1,10 @@
+def find_lowest(temperatures):
+    # temperatures.sort()
+    # print(temperatures[0])
+    sorted_temps = sorted(temperatures)  # sorted returns a new list
+    print(sorted_temps[0])
+
+
+temps = [85, 76, 79, 72, 81]
+find_lowest(temps)
+print(temps)
diff --git a/Ch5/mutable_tacos.py b/Ch5/mutable_tacos.py
@@ -0,0 +1,21 @@
+import copy
+
+
+class Taco:
+
+    def __init__(self, toppings):
+        # self.ingredients = toppings
+        self.ingredients = copy.copy(toppings)
+
+    def add_sauce(self, sauce):
+        self.ingredients.append(sauce)
+
+
+default_toppings = ["Lettuce", "Tomato", "Cheese", "Beef"]
+mild_taco = Taco(default_toppings)
+hot_taco = copy.deepcopy(mild_taco)
+hot_taco.add_sauce("Salsa")
+
+print(f"Hot: {hot_taco.ingredients}")
+print(f"Mild: {mild_taco.ingredients}")
+print(f"Default: {default_toppings}")
diff --git a/Ch5/mutable_types.py b/Ch5/mutable_types.py
@@ -0,0 +1,7 @@
+temps = [87, 76, 79]
+highs = temps
+print(temps is highs)  # prints True
+temps += [81]
+print(temps is highs)  # prints True
+print(highs)           # prints [87, 76, 79, 81]
+print(temps)           # prints [87, 76, 79, 81]
diff --git a/Ch5/nonlocal.py b/Ch5/nonlocal.py
@@ -0,0 +1,20 @@
+spam = True
+
+
+def order():
+    eggs = 12
+
+    def cook():
+        nonlocal eggs
+
+        if spam:
+            print("Spam!")
+
+        if eggs:
+            eggs -= 1
+            print("...and eggs.")
+
+    cook()
+
+
+order()
diff --git a/Ch5/team_scores.py b/Ch5/team_scores.py
@@ -0,0 +1,11 @@
+scores_team_1 = [100, 95, 120]
+scores_team_2 = [45, 30, 10]
+scores_team_3 = [200, 35, 190]
+
+scores = (scores_team_1, scores_team_2, scores_team_3)
+
+scores_team_1[0] = 300
+print(scores[0])  # prints [300, 95, 120]
+
+scores[0][0] = 400
+print(scores[0])  # prints [400, 95, 120]
diff --git a/Ch5/tic_tac_toe.py b/Ch5/tic_tac_toe.py
@@ -0,0 +1,8 @@
+# board = [["-"] * 3] * 3  # Create a board
+board = [["-"] * 3 for _ in range(3)]
+
+board[1][0] = "X"        # Make a move
+
+# Print board to screen
+for row in board:
+    print(f"{row[0]} {row[1]} {row[2]}")
diff --git a/Ch5/types.py b/Ch5/types.py
@@ -0,0 +1,7 @@
+answer = 42
+
+print(type(answer))  # prints <class 'int'>
+
+# if type(answer) is int:
+if isinstance(answer, int):
+    print("What's the question?")

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+print(42.5) # coerces to a string`
	`2`	`+x = 5 + 1.5 # coerces to a float (6.5)`
	`3`	`+y = 5 + True # coerces to an int (6)...and is also considered a bad idea`