dataclass.py

Author: Xinxi

Sprint5/Limits of type checking.py

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+def double(number):
+    return number * 3
+print(double(10))
+
+#this code runs perfectly.

Sprint5/class&objects.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)
+print(imran.address)
+
+eliza = Person("Eliza", 34, "Arch Linux")
+print(eliza.name)
+print(eliza.address)

Sprint5/dataclass.py

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+from dataclasses import dataclass
+from datetime import date
+
+@dataclass(frozen=True)
+class Person:
+    name: str
+    birth_date: date
+    preferred_operating_system: str
+
+    def is_adult(self) -> bool:
+        today = date.today()
+        age = today.year - self.birth_date.year
+        
+        birthday_has_passed = (today.month, today.day) >= (self.birth_date.month, self.birth_date.day)
+        
+        if not birthday_has_passed:
+            age -= 1
+            
+        return age >= 18
+
+imran1 = Person("Imran", date(2000, 5, 20), "Ubuntu")
+imran2 = Person("Imran", date(2000, 5, 20), "Ubuntu")
+
+print(imran1)  
+print(f"Are they equal? {imran1 == imran2}") 
+print(f"Is Imran an adult? {imran1.is_adult()}")

Sprint5/methods.py

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+# The advantage of using methods instead of free functions.
+# 1. Encapsulation & Organization: methods group behavior directly with the data it operates on the object.
+# 2. State management: methods have direct access to 'self'.
+# 3. Readibility.
+
+from datetime import date
+
+class Person:
+    def __init__(self, name: str, birth_date: date, preferred_operating_system: str):
+        self.name = name
+        self.birth_date = birth_date
+        self.preferred_operating_system = preferred_operating_system
+
+    def is_adult(self) -> bool:
+        today = date.today()
+        age = today.year - self.birth_date.year
+        birthday_has_passed: bool = (today.month, today.day) >= (self.birth_date.month, self.birth_date.day)
+        
+        if not birthday_has_passed:
+            age -= 1
+        return age >= 18
+
+imran = Person("Imran", date(2000, 5, 20), "Ubuntu")
+print(f"Is Imran an adult? {imran.is_adult()}")

Sprint5/mypy.py

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+from typing import Dict
+
+# Added Type Annotations
+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}")
+        # If 'pence' isn't an int, this will fail or cause issues later
+        total += pence
+    return total
+
+def format_pence_as_string(total_pence: int) -> str:
+    if total_pence < 100:
+        return f"{total_pence}p"
+    # Use // for floor division to ensure 'pounds' is an int
+    pounds = total_pence // 100
+    pence = total_pence % 100
+    return f"£{pounds}.{pence:02d}"
+
+balances: Dict[str, int] = {
+    "Sima": 700,
+    "Linn": 545,
+    "Georg": 831,
+}
+
+# BUGS FIXED HERE: 
+# Changed 9.13 (float) to 913 (int)
+# Changed "£7.13" (str) to 713 (int)
+open_account(balances, "Tobi", 913)
+open_account(balances, "Olya", 713)
+
+total_pence = sum_balances(balances)
+
+# BUG FIXED HERE: Corrected the function name call
+total_string = format_pence_as_string(total_pence)
+
+print(f"The bank accounts total {total_string}")