Context Managers များသည် resources များကို properly manage လုပ်ရန် with statement ကို အသုံးပြုသည်။ Files, database connections စသည့် resources များကို automatic cleanup လုပ်ပေးသည်။
🎯 Benefits:
• Automatic resource cleanup
• Exception-safe
• Cleaner code
python
# File handling with context manager
# (For demo purposes - file operations simulated)
# Custom context manager
class Timer:
def __enter__(self):
import time
self.start = time.time()
print("Timer started")
return self
def __exit__(self, *args):
import time
elapsed = time.time() - self.start
print(f"Timer stopped. Elapsed: {elapsed:.4f}s")
with Timer():
# Simulate some work
result = sum([i**2 for i in range(10000)])
print("Context manager ensures cleanup!")You should see
Timer started Timer stopped. Elapsed: 0.0023s Context manager ensures cleanup!