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from __future__ import print_function, unicode_literals import sys import functools def debug(fn): def wrapper(*args, **kwargs): print(fn.__name__, 'called!') print(sorted(args), tuple(sorted(kwargs.items()))) res = fn(*args, **kwargs) print(res) return res return wrapper class cache(object): def __init__(self, fn): self.fn = fn self._cache = {} functools.update_wrapper(self, fn) def __call__(self, *args, **kwargs): key = str(args) + str(kwargs) if key in self._cache: ret = self._cache[key] else: ret = self._cache[key] = self.fn(*args, **kwargs) return ret def clear_cache(self): self._cache = {} # from http://stackoverflow.com/questions/3627793/best-output-type-and-encoding-practices-for-repr-functions def stdout_encode(u, default='UTF8'): encoding = sys.stdout.encoding or default if sys.version_info > (3, 0): return u.encode(encoding).decode(encoding) return u.encode(encoding)