Build a Personal Work Hours Tracker in Python

import csv
from pathlib import Path
from datetime import datetime, date

class WorkHoursTracker:
    def __init__(self, file_path="work_hours.csv"):
        self.file_path = Path(file_path)
        if not self.file_path.exists():
            with open(self.file_path, "w", newline="") as f:
                writer = csv.writer(f)
                writer.writerow(["date", "start_time", "end_time", "hours_worked"])

    def log_hours(self, start, end):
        start_dt = datetime.strptime(start, "%H:%M")
        end_dt = datetime.strptime(end, "%H:%M")
        hours = (end_dt - start_dt).total_seconds() / 3600
        with open(self.file_path, "a", newline="") as f:
            writer = csv.writer(f)
            writer.writerow([date.today().isoformat(), start, end, round(hours, 2)])

    def weekly_summary(self):
        today = date.today()
        week_start = today.isocalendar()
        total = 0.0
        with open(self.file_path, "r") as f:
            reader = csv.DictReader(f)
            for row in reader:
                row_date = datetime.strptime(row["date"], "%Y-%m-%d").date()
                if row_date.isocalendar()[1] == week_start[1] and row_date.year == today.year:
                    total += float(row["hours_worked"])
        print(f"Week {week_start[1]} total hours: {total:.2f}")

if __name__ == "__main__":
    tracker = WorkHoursTracker()
    tracker.log_hours("09:00", "12:30")
    tracker.log_hours("13:30", "17:00")
    tracker.weekly_summary()