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Python functools.cached_property方法代碼示例

本文整理匯總了Python中functools.cached_property方法的典型用法代碼示例。如果您正苦於以下問題:Python functools.cached_property方法的具體用法?Python functools.cached_property怎麽用?Python functools.cached_property使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在functools的用法示例。


在下文中一共展示了functools.cached_property方法的3個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Python代碼示例。

示例1: __get__

# 需要導入模塊: import functools [as 別名]
# 或者: from functools import cached_property [as 別名]
def __get__(
            self, instance: None, owner: Optional["Type[_S]"] = ...
        ) -> "cached_property[_S, _T]":
            raise NotImplementedError() 
開發者ID:pytest-dev,項目名稱:pytest,代碼行數:6,代碼來源:compat.py

示例2: __set_name__

# 需要導入模塊: import functools [as 別名]
# 或者: from functools import cached_property [as 別名]
def __set_name__(self, owner, name):
            if self.attrname is None:
                self.attrname = name
            elif name != self.attrname:
                raise TypeError(
                    "Cannot assign the same cached_property to two different names "
                    f"({self.attrname!r} and {name!r})."
                ) 
開發者ID:JarryShaw,項目名稱:PyPCAPKit,代碼行數:10,代碼來源:compat.py

示例3: __get__

# 需要導入模塊: import functools [as 別名]
# 或者: from functools import cached_property [as 別名]
def __get__(self, instance, owner=None):
            if instance is None:
                return self
            if self.attrname is None:
                raise TypeError(
                    "Cannot use cached_property instance without calling __set_name__ on it.")
            try:
                cache = instance.__dict__
            except AttributeError:  # not all objects have __dict__ (e.g. class defines slots)
                msg = (
                    f"No '__dict__' attribute on {type(instance).__name__!r} "
                    f"instance to cache {self.attrname!r} property."
                )
                raise TypeError(msg) from None
            val = cache.get(self.attrname, _NOT_FOUND)
            if val is _NOT_FOUND:
                with self.lock:
                    # check if another thread filled cache while we awaited lock
                    val = cache.get(self.attrname, _NOT_FOUND)
                    if val is _NOT_FOUND:
                        val = self.func(instance)
                        try:
                            cache[self.attrname] = val
                        except TypeError:
                            msg = (
                                f"The '__dict__' attribute on {type(instance).__name__!r} instance "
                                f"does not support item assignment for caching {self.attrname!r} property."
                            )
                            raise TypeError(msg) from None
            return val 
開發者ID:JarryShaw,項目名稱:PyPCAPKit,代碼行數:32,代碼來源:compat.py


注:本文中的functools.cached_property方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台,相關代碼片段篩選自各路編程大神貢獻的開源項目,源碼版權歸原作者所有,傳播和使用請參考對應項目的License;未經允許,請勿轉載。