File manager - Edit - /opt/gsutil/gslib/lazy_wrapper.py
Back
# -*- coding: utf-8 -*- # Copyright 2018 Google Inc. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """Provides a LazyWrapper class to defer loading a value until it's needed.""" from __future__ import absolute_import from __future__ import print_function from __future__ import division from __future__ import unicode_literals class LazyWrapper(object): """Wrapper for lazily instantiated objects.""" def __init__(self, func): """The init method for LazyWrapper. Args: func: A function (lambda or otherwise) to lazily evaluate. """ self._func = func def __int__(self): try: return int(self._value) except AttributeError: self._value = self._func() return int(self._value) def __eq__(self, other): try: return self._value == other except AttributeError: self._value = self._func() return self._value == other def __repr__(self): try: return str(self._value) except AttributeError: self._value = self._func() return str(self._value) def __str__(self): try: return str(self._value) except AttributeError: self._value = self._func() return str(self._value) def __call__(self): """The call method for a LazyWrapper object.""" try: return self._value except AttributeError: self._value = self._func() return self._value def __len__(self): """The len method for a LazyWrapper object.""" try: return len(self._value) except AttributeError: self.__call__() return len(self._value) def __iter__(self): """The iter method for a LazyWrapper object.""" try: return self._value.__iter__() except AttributeError: self.__call__() return self._value.__iter__()
| ver. 1.4 |
Github
|
.
| PHP 8.2.28 | Generation time: 0.02 |
proxy
|
phpinfo
|
Settings