Update get_top_billionaires.py

Fixed calculate_age function such that is returns the age correctly from a given timestamp. Fixed doctests to be robust when year changes

web_programming/get_top_billionaires.py

@@ -20,36 +20,31 @@ API_URL = (
 )
 
 
-def calculate_age(unix_date: float) -> str:
+def calculate_age(unix_timestamp: float) -> str:
     """Calculates age from given unix time format.
 
     Returns:
         Age as string
 
     >>> from datetime import datetime, UTC
-    >>> years_since_create = datetime.now(tz=UTC).year - 2022
-    >>> int(calculate_age(-657244800000)) - years_since_create
-    72
-    >>> int(calculate_age(46915200000)) - years_since_create
-    50
+    >>> 2024 - int(calculate_age(946684800))
+    2000
+    >>> 2024 - int(calculate_age(-2145703316))
+    1902
+    >>> 2024 - int(calculate_age(2209202284))
+    2040
     """
     # Convert date from milliseconds to seconds
-    unix_date /= 1000
+    birth_date = datetime.fromtimestamp(unix_timestamp, tz=UTC)
 
-    if unix_date < 0:
-        # Handle timestamp before epoch
-        epoch = datetime.fromtimestamp(0, tz=UTC)
-        seconds_since_epoch = (datetime.now(tz=UTC) - epoch).seconds
-        birthdate = (
-            epoch - timedelta(seconds=abs(unix_date) - seconds_since_epoch)
-        ).date()
-    else:
-        birthdate = datetime.fromtimestamp(unix_date, tz=UTC).date()
-    return str(
-        TODAY.year
-        - birthdate.year
-        - ((TODAY.month, TODAY.day) < (birthdate.month, birthdate.day))
+    # Calculate the age
+    current_date = datetime.now(tz=UTC)
+    age = (
+            current_date.year -
+            birth_date.year -
+            ((current_date.month, current_date.day) < (birth_date.month, birth_date.day))
     )
+    return str(age)
 
 
 def get_forbes_real_time_billionaires() -> list[dict[str, str]]: