Scheduling Scripts

import time
from datetime import datetime

# Using the schedule library:
# pip install schedule
# import schedule
# 
# def job():
#     print(f"Running at {datetime.now()}")
# 
# schedule.every(10).minutes.do(job)
# schedule.every().hour.do(job)
# schedule.every().day.at("10:30").do(job)
# 
# while True:
#     schedule.run_pending()
#     time.sleep(1)

# Demo: simple scheduler
class SimpleScheduler:
    def __init__(self):
        self.jobs = []
    
    def every(self, seconds, func, name=""):
        self.jobs.append({
            "interval": seconds,
            "func": func,
            "name": name,
            "last_run": 0
        })
    
    def run_demo(self, cycles=3):
        for cycle in range(cycles):
            print(f"\n--- Cycle {cycle + 1} ---")
            for job in self.jobs:
                job["func"]()
                job["last_run"] = cycle

# Tasks
def backup():
    print(f"  💾 Backing up data... ({datetime.now().strftime('%H:%M:%S')})")

def cleanup():
    print(f"  🧹 Cleaning temp files...")

def health_check():
    print(f"  ✅ System OK")

# Schedule
scheduler = SimpleScheduler()
scheduler.every(60, backup, "backup")
scheduler.every(300, cleanup, "cleanup")
scheduler.every(30, health_check, "health")

print("=== Task Scheduler Demo ===")
scheduler.run_demo(2)

# OS-level scheduling:
print("\n=== OS Scheduling ===")
print("Linux/Mac: crontab -e")
print("  */5 * * * * python /path/to/script.py")
print("Windows: Task Scheduler")
print("  schtasks /create /sc minute /mo 5 /tn MyTask ...")