moving files from the main directory to a separate folder

Author: Nataliia74

prep-exercises/dataclasses_ex.py

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+from datetime import date
+from dataclasses import dataclass
+
+@dataclass(frozen=True)
+class Person:
+        name: str
+        preferred_operating_system: str
+        birth_date: date
+
+        def is_adult(self) -> bool:
+            today = date.today()
+            age = today.year - self.birth_date.year
+
+            if (today.month, today.day) < (self.birth_date.month, self.birth_date.day):
+                age -=1
+                
+            return age >= 18
+
+imran = Person("Imran", "Ubuntu", date(2000, 9, 12))
+
+print(imran.is_adult())
+
+
+

prep-exercises/enums.py

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+from dataclasses import dataclass
+from enum import Enum
+from typing import List, Dict
+
+
+
+
+
+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 count_laptops(laptops: List[Laptop]) -> Dict[OperatingSystem, int]:
+    number_eachOS_laptops: Dict[OperatingSystem, int] = {
+        OperatingSystem.MACOS: 0,
+        OperatingSystem.ARCH: 0,
+        OperatingSystem.UBUNTU: 0}
+    for laptop in laptops:
+        number_eachOS_laptops[laptop.operating_system] +=1
+    return number_eachOS_laptops
+
+
+def count_possible_laptops(laptops: List[Laptop], person: Person) -> int:
+    possible_laptops: List[Laptop] =[]
+    for laptop in laptops:
+        if laptop.operating_system == person.preferred_operating_system:
+            possible_laptops.append(laptop)
+    number_possible_laptops = len(possible_laptops)
+    return number_possible_laptops
+
+def chose_alternative_laptops(laptops: List[Laptop], person: Person) -> Dict[OperatingSystem, int]:
+    number_possible_laptops = count_possible_laptops(laptops, person)
+    number_eachOS_laptops = count_laptops(laptops)
+    preferred_os = person.preferred_operating_system
+    alternative_laptops: Dict[OperatingSystem, int] = {}
+    for eachOS, count in number_eachOS_laptops.items():
+        if eachOS == preferred_os:
+            continue
+        if count > number_possible_laptops:
+            alternative_laptops[eachOS] = count
+    if len(alternative_laptops) != 0:
+        print("There is an operating system that has more laptops available.If you’re willing to accept them, there is a list:")
+        list_os = []
+        for os, count in alternative_laptops.items():
+            list_os.append(f"{os.value}: {count}")
+        print(" ,".join(list_os))
+        return alternative_laptops
+    else:
+        print("There is not an operating system that has more laptops available.")
+        return alternative_laptops
+
+while True:
+    user_name = input("Type your name: ").strip()
+    if len(user_name) < 3:
+        print(f"Error, {user_name} is not valid. Try again, length should be more than 3 characters.")
+        continue
+    break
+
+while True:
+    user_age = input("Type your age: ").strip()
+    try:
+        user_age_int = int(user_age)
+        if user_age_int < 18:
+            raise ValueError
+        break
+    except ValueError:
+        print("Invalid age, try again! Borrowing allowed from 18 years old.")
+
+available_os = [os.value for os in OperatingSystem]
+print("Available OSs are: ", ",".join(available_os))
+while True:
+    user_operating_system = input("Type operating system: ").strip()
+    try:
+        if user_operating_system not in available_os:
+            raise ValueError
+        break
+    except ValueError:
+        print(f"Error, {user_operating_system} is not in available list\n"
+    f"Available OSs are: {','.join(available_os)}. Try again!.", file=sys.stderr)
+
+
+preferred_operating_system = OperatingSystem(user_operating_system)
+
+user = Person(name=user_name, age=user_age_int, preferred_operating_system=preferred_operating_system)
+
+
+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),
+]
+
+possible_laptops = count_possible_laptops(laptops, user)
+print(f"Possible laptops for {user_name}: {possible_laptops}")
+alternative_laptops = chose_alternative_laptops(laptops, user)

prep-exercises/familytree.py

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+from dataclasses import dataclass
+from typing import List
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    children: List["Person"]
+    age: int
+
+fatma = Person(name="Fatma", children=[], age=17)
+aisha = Person(name="Aisha", children=[], age=25)
+
+imran = Person(name="Imran", children=[fatma, aisha], age=51)
+
+def print_family_tree(person: Person) -> None:
+    print(person.name, f"({person.age})")
+    for child in person.children:
+        print(f"- {child.name} ({child.age})")
+
+# recursion
+
+def print_family_tree_recursion(person: Person, level:str = "¬") -> None:
+    print(f"{level} {person.name} ({person.age})")
+    for child in person.children:
+        print_family_tree_recursion(child, level + "|-")
+
+print_family_tree_recursion(fatma)

prep-exercises/inherit.py

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+from typing import List
+
+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: str) -> None:
+        self.previous_last_names.append(self.last_name)
+        self.last_name = last_name
+
+    def get_full_name(self) -> str:
+        suffix: str = ""
+        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())  // this method dose not belong to Parent class
+# person2.change_last_name("Tyurina") // this method dose not belong to Parent class
+print(person2.get_name())
+# print(person2.get_full_name()) // this method dose not belong to Parent class

prep-exercises/type_guide_refact.py

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+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: list[Laptop] = []
+    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"]),
+    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}")

prep-exercises/typesExer.py

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+from typing import Union, Dict
+
+
+def open_account(balances: Dict[str, int], name: str, amount: Union[str, float]):
+    balances[name] = int(float(amount) *100)
+
+def sum_balances(accounts: Dict[str, int]):
+    total = 0
+    for name, pence in accounts.items():
+        print(f"{name} had balance {pence}")
+        total += pence
+    return total
+
+def format_pence_as_pound(total_pence: int) -> str:
+    if total_pence < 100:
+        return f"{total_pence}p"
+    pounds = total_pence // 100
+    pence = total_pence % 100
+    return f"£{pounds}.{pence:02d}"
+
+balances = {
+    "Sima": 700,
+    "Linn": 545,
+    "Georg": 831,
+}
+
+open_account(balances, "Tobi", 9.13)
+open_account(balances, "Olya", 7.13)
+
+total_pence = sum_balances(balances)
+total_pound = format_pence_as_pound(total_pence)
+
+print(f"The bank accounts total {total_pound}")