NW | 26-SDC-MAR | Ahmad Hmedan | Sprint 5 | Prep-exercises

Sprint5-exercise/classes-and-object.py

@@ -0,0 +1,24 @@
+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
+
+
+def is_adult(person: Person) -> bool:
+    return person.age >= 18
+
+
+def double(person: Person) -> int:
+    return person.price * 2
+
+
+imran = Person("Imran", 22, "Ubuntu")
+print(imran.name)
+
+
+eliza = Person("Eliza", 34, "Arch Linux")
+print(eliza.name)
+
+
+print(is_adult(imran))

Sprint5-exercise/dataclass.py

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+from datetime import date
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    date_of_birth: date
+    preferred_operating_system: str
+
+    def is_adult(self) -> bool:
+        current_date = date.today()
+        age = current_date.year - self.date_of_birth.year
+
+        if (current_date.month, current_date.day) < (
+            self.date_of_birth.month,
+            self.date_of_birth.day,
+        ):
+            age -= 1
+
+        return age >= 18
+
+
+imran = Person("Imran", date(1995, 10, 16), "Ubuntu")
+print(imran.is_adult())

Sprint5-exercise/enumexercise.py

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+from dataclasses import dataclass
+from typing import List
+from enum import Enum
+import sys
+
+
+class OperatingSystem(Enum):
+    MACOS = "makOS"
+    ARCH = "Arch Linux"
+    UBUNTU = "Ubuntu"
+
+
+@dataclass(frozen=True)
+class Laptop:
+    id: int
+    manufacturer: str
+    model: str
+    screen_size_in_inches: int
+    operating_system: OperatingSystem
+
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    age: int
+    preferred_operating_system: OperatingSystem
+
+
+def parse_age(age_txt: str) -> int:
+    try:
+        age = int(age_txt)
+    except ValueError:
+        print("Error:age must be a valid integer", file=sys.stderr)
+        sys.exit(1)
+
+    if age < 0:
+        print("Error: age should be a positive number", file=sys.stderr)
+        sys.exit(1)
+
+    return age
+
+
+def parse_operating_system(op_tx: str) -> OperatingSystem:
+    normalized = op_tx.strip().lower()
+
+    mapping = {
+        "makos": OperatingSystem.MACOS,
+        "ubuntu": OperatingSystem.UBUNTU,
+        "arch": OperatingSystem.ARCH,
+        "arch linux": OperatingSystem.ARCH,
+    }
+
+    op: OperatingSystem = mapping.get(normalized)
+
+    if op is None:
+        print(
+            "Error: operating system must be one of: Ubuntu, Arch Linux, macOS.",
+            file=sys.stderr,
+        )
+        sys.exit(1)
+
+    return op
+
+
+def find_matching_laptops(
+    laptops: List[Laptop], operating_system: OperatingSystem
+) -> int:
+    counter: int = 0
+    for laptop in laptops:
+        if laptop.operating_system == operating_system:
+            counter += 1
+
+    return counter
+
+
+def find_most_available(laptops: List[Laptop]) -> OperatingSystem:
+    count = {}
+    for laptop in laptops:
+        if laptop.operating_system in count:
+            count[laptop.operating_system] += 1
+        else:
+            count[laptop.operating_system] = 1
+    return max(count, key=count.get)
+
+
+def main() -> None:
+
+    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,
+        ),
+    ]
+
+    name = input("Enter your name: ").strip()
+    if name == "":
+        print("Error: name must not be empty", file=sys.stderr)
+        sys.exit(1)
+    age_txt = input("Enter your age: ")
+    operating_system_txt = input("Enter operating system: ")
+
+    age = parse_age(age_txt)
+    operating_system = parse_operating_system(operating_system_txt)
+
+    person = Person(
+        name=name,
+        age=age,
+        preferred_operating_system=operating_system,
+    )
+
+    matching_laptops_count = find_matching_laptops(
+        laptops, person.preferred_operating_system
+    )
+    print(
+        f"Library has {matching_laptops_count} laptop(s) with {person.preferred_operating_system}"
+    )
+
+    most_available_os = find_most_available(laptops)
+
+    if most_available_os != person.preferred_operating_system:
+        count_most_available_os = find_matching_laptops(laptops, most_available_os)
+        print(
+            f"If you're willing to accept {most_available_os.value}, "
+            f"you're more likely to get a laptop because the library has "
+            f"{count_most_available_os} with that operating system."
+        )
+
+if __name__ == "__main__":
+   main()

Sprint5-exercise/generics.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=22, children=[])
+aisha = Person(name="Aisha", age=25, children=[])
+
+imran = Person(name="Imran", age=40, 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)

Sprint5-exercise/methods.py

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+from datetime import date
+
+
+class Person:
+    def __init__(self, name: str, date_of_birth: date, preferred_operating_system: str):
+        self.name = name
+        self.date_of_birth = date_of_birth
+        self.preferred_operating_system = preferred_operating_system
+
+    def is_adult(self) -> bool:
+        current_date = date.today()
+        age = current_date.year - self.date_of_birth.year
+
+        if (current_date.month, current_date.day) < (
+            self.date_of_birth.month,
+            self.date_of_birth.day,
+        ):
+            age -= 1
+
+        return age >= 18
+
+
+imran = Person("Imran", date(1995, 10, 16), "Ubuntu")
+print(imran.is_adult())

Sprint5-exercise/type-checking-with-mypy.py

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+def open_account(balances: dict[str, int], name: str, amount: int) -> None:
+    balances[name] = amount
+
+
+def sum_balances(accounts: dict[str, int]) -> int:
+    total = 0
+    for name, pence in accounts.items():
+        print(f"{name} had balance {pence}")
+        total += pence
+    return total
+
+
+def format_pence_as_string(total_pence: int) -> str:
+    if total_pence < 100:
+        return f"{total_pence}p"
+    pounds = int(total_pence / 100)
+    pence = total_pence % 100
+    return f"£{pounds}.{pence:02d}"
+
+
+balances = {
+    "Sima": 700,
+    "Linn": 545,
+    "Georg": 831,
+}
+
+open_account(balances, "Tobi", 913)
+open_account(balances, "Olya", 713)
+
+total_pence = sum_balances(balances)
+total_string = format_pence_as_string(total_pence)
+
+print(f"The bank accounts total {total_string}")

Sprint5-exercise/type-guided.py

@@ -0,0 +1,68 @@
+from dataclasses import dataclass
+from typing import List
+
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    age: int
+    preferred_operating_systems: List[str]
+
+
+@dataclass(frozen=True)
+class Laptop:
+    id: int
+    manufacturer: str
+    model: str
+    screen_size_in_inches: float
+    operating_system: str
+
+
+def find_possible_laptops(laptops: List[Laptop], person: Person) -> List[Laptop]:
+    possible_laptops = []
+    for laptop in laptops:
+
+        if laptop.operating_system in person.preferred_operating_systems:
+            possible_laptops.append(laptop)
+    return possible_laptops
+
+
+people = [
+    Person(name="Imran", age=22, preferred_operating_systems=["Ubuntu", "Arch Linux"]),
+    Person(name="Eliza", age=34, preferred_operating_systems=["Arch Linux"]),
+]
+
+laptops = [
+    Laptop(
+        id=1,
+        manufacturer="Dell",
+        model="XPS",
+        screen_size_in_inches=13,
+        operating_system="Arch Linux",
+    ),
+    Laptop(
+        id=2,
+        manufacturer="Dell",
+        model="XPS",
+        screen_size_in_inches=15,
+        operating_system="Ubuntu",
+    ),
+    Laptop(
+        id=3,
+        manufacturer="Dell",
+        model="XPS",
+        screen_size_in_inches=15,
+        operating_system="Ubuntu",
+    ),
+    Laptop(
+        id=4,
+        manufacturer="Apple",
+        model="macBook",
+        screen_size_in_inches=13,
+        operating_system="macOS",
+    ),
+]
+
+for person in people:
+    possible_laptops = find_possible_laptops(laptops, person)
+    print(f"Possible laptops for {person.name}: {possible_laptops}")