(func)
| 20 | |
| 21 | |
| 22 | def lazy(func): |
| 23 | result = _Result() |
| 24 | |
| 25 | lock = threading.Lock() |
| 26 | |
| 27 | @functools.wraps(func) |
| 28 | def wrapper(*args, **kwargs): |
| 29 | try: |
| 30 | return result.result |
| 31 | except AttributeError: |
| 32 | with lock: |
| 33 | try: |
| 34 | return result.result |
| 35 | except AttributeError: |
| 36 | result.result = func(*args, **kwargs) |
| 37 | |
| 38 | return result.result |
| 39 | |
| 40 | return wrapper |
| 41 | |
| 42 | |
| 43 | def lazy_property(fn): |