| # Copyright 2017 The Chromium Authors |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import functools |
| import logging |
| |
| |
| def Memoize(f): |
| """Decorator to cache return values of function.""" |
| memoize_dict = {} |
| @functools.wraps(f) |
| def wrapper(*args, **kwargs): |
| key = repr((args, kwargs)) |
| if key not in memoize_dict: |
| memoize_dict[key] = f(*args, **kwargs) |
| return memoize_dict[key] |
| return wrapper |
| |
| |
| def NoRaiseException(default_return_value=None, exception_message=''): |
| """Returns decorator that catches and logs uncaught Exceptions. |
| |
| Args: |
| default_return_value: Value to return in the case of uncaught Exception. |
| exception_message: Message for uncaught exceptions. |
| """ |
| def decorator(f): |
| @functools.wraps(f) |
| def wrapper(*args, **kwargs): |
| try: |
| return f(*args, **kwargs) |
| except Exception: # pylint: disable=broad-except |
| logging.exception(exception_message) |
| return default_return_value |
| return wrapper |
| return decorator |
