week-5-prep

Author: craig-dsilva

week-5-prep/.gitignore

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+# Byte-compiled / optimized / DLL files
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+*.py[codz]
+*$py.class
+
+# C extensions
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+# Streamlit
+.streamlit/secrets.toml

week-5-prep/classes_exercise.py

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+class Person:
+    def __init__(self, name: str, age: int, preferred_operating_system: str):
+        self.name = name
+        self.age = age
+        self.preferred_operating_system = preferred_operating_system
+
+imran = Person("Imran", 22, "Ubuntu")
+print(imran.name)
+
+eliza = Person("Eliza", 34, "Arch Linux")
+print(eliza.name)
+
+def is_adult(person: Person) -> bool:
+    return person.age >= 18
+
+def print_address(person: Person) -> str:
+    return person.address
+
+print(print_address(imran))
+
+print(is_adult(imran))

week-5-prep/dataclasses_exercise.py

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+from dataclasses import dataclass
+import datetime as dt
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    age: dt.date
+    preferred_operating_system: str
+
+imran = Person("Imran", "2004-04-18", "Ubuntu")
+print(imran)
+
+imran2 = Person("Imran", "2004-04-18", "Ubuntu")
+print(imran == imran2)

week-5-prep/enum_exercise.py

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+from dataclasses import dataclass
+from enum import Enum
+from typing import List
+
+class OperatingSystem(Enum):
+    MACOS = "macOS"
+    ARCH = "Arch Linux"
+    UBUNTU = "Ubuntu"
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    age: int
+    preferred_operating_system: OperatingSystem
+
+
+@dataclass(frozen=True)
+class Laptop:
+    id: int
+    manufacturer: str
+    model: str
+    screen_size_in_inches: float
+    operating_system: OperatingSystem
+
+
+def find_possible_laptops(laptops: List[Laptop], person: Person) -> List[Laptop]:
+    possible_laptops = []
+    for laptop in laptops:
+        if laptop.operating_system == person.preferred_operating_system:
+            possible_laptops.append(laptop)
+    return possible_laptops
+    
+people = [
+    Person(name="Imran", age=22, preferred_operating_system=OperatingSystem.UBUNTU),
+    Person(name="Eliza", age=34, preferred_operating_system=OperatingSystem.ARCH),
+]
+
+laptops = [
+    Laptop(id=1, manufacturer="Dell", model="XPS", screen_size_in_inches=13, operating_system=OperatingSystem.ARCH),
+    Laptop(id=2, manufacturer="Dell", model="XPS", screen_size_in_inches=15, operating_system=OperatingSystem.UBUNTU),
+    Laptop(id=3, manufacturer="Dell", model="XPS", screen_size_in_inches=15, operating_system=OperatingSystem.UBUNTU),
+    Laptop(id=4, manufacturer="Apple", model="macBook", screen_size_in_inches=13, operating_system=OperatingSystem.MACOS),
+]
+
+for person in people:
+    possible_laptops = find_possible_laptops(laptops, person)
+    print(f"Possible laptops for {person.name}: {len(possible_laptops)}")
+

week-5-prep/generics_exercise.py

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+from dataclasses import dataclass
+from typing import List
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    age: int
+    children: List["Person"]
+
+fatma = Person(name="Fatma", age=4, children=[])
+aisha = Person(name="Aisha", age=2, children=[])
+
+imran = Person(name="Imran", age=22, children=[fatma, aisha])
+
+def print_family_tree(person: Person) -> None:
+    print(person.name)
+    for child in person.children:
+        print(f"- {child.name} ({child.age})")
+
+print_family_tree(imran)

week-5-prep/inheritance_exercise.py

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+class Parent:
+    def __init__(self, first_name: str, last_name: str):
+        self.first_name = first_name
+        self.last_name = last_name
+
+    def get_name(self) -> str:
+        return f"{self.first_name} {self.last_name}"
+
+
+class Child(Parent):
+    def __init__(self, first_name: str, last_name: str):
+        super().__init__(first_name, last_name)
+        self.previous_last_names: list[str] = []
+
+    def change_last_name(self, last_name) -> None:
+        self.previous_last_names.append(self.last_name)
+        self.last_name = last_name
+
+    def get_full_name(self) -> str:
+        suffix = ""
+        if len(self.previous_last_names) > 0:
+            suffix = f" (née {self.previous_last_names[0]})"
+        return f"{self.first_name} {self.last_name}{suffix}"
+
+person1 = Child("Elizaveta", "Alekseeva")
+print(person1.get_name())
+print(person1.get_full_name())
+person1.change_last_name("Tyurina")
+print(person1.get_name())
+print(person1.get_full_name())
+
+person2 = Parent("Elizaveta", "Alekseeva")
+print(person2.get_name())
+# print(person2.get_full_name())
+# person2.change_last_name("Tyurina")
+print(person2.get_name())
+# print(person2.get_full_name())

week-5-prep/methods_exercise.py

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+import datetime as dt
+
+class Person:
+    def __init__(self, name: str, dob: str, preferred_operating_system: str):
+        self.name = name
+        self.age = dt.date.today().year - int(dob.split("-")[0])
+        
+        self.preferred_operating_system = preferred_operating_system
+
+    def is_adult(self):
+        return self.age >= 18
+
+imran = Person("Imran", "2004-04-18", "Ubuntu")
+print(imran.is_adult())

week-5-prep/test_mypy.py

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+def double(number: int) -> int:
+    return number * 2
+
+result = double(21)
+
+reveal_type(result)