code: 
  
  
  from __future__ import annotations
  
  from collections.abc import Callable
  from typing import Generic, TypeVar
  
  A_    :					Union[str, Any]             =TypeVar("""T""")
  A_    :					Dict             =TypeVar("""U""")
  
  
  
  
  
  class        lowercase_				( Generic[T, U]):
  
  
  							def __init__(   self			,    _UpperCAmelCase			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													a_					=		key
  													a_					=		val
  													a_					=		0
  													a_					=		None
  													a_					=		None
  
  
  
  
  
  
  							def __repr__(   self		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													return "Node: key: {}, val: {}, freq: {}, has next: {}, has prev: {}".format(
  													    self.key			,    self.val			,    self.freq			,    self.next is not None			,    self.prev is not None		)
  
  
  
  
  
  class        lowercase_				( Generic[T, U]):
  
  
  							def __init__(   self		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													a_					=		DoubleLinkedListNode(_UpperCAmelCase			,    _UpperCAmelCase		)
  													a_					=		DoubleLinkedListNode(_UpperCAmelCase			,    _UpperCAmelCase		)
  													a_					=		self.rear, self.head
  
  
  							def __repr__(   self		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													a_					=		["DoubleLinkedList"]
  													a_					=		self.head
  													while node.next is not None:
  																			rep.append(str(_UpperCAmelCase		)		)
  																			a_					=		node.next
  													rep.append(str(self.rear		)		)
  													return ",\n    ".join(_UpperCAmelCase		)
  
  
  							def 						lowercase__     (   self			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													a_					=		self.rear.prev
  
  													# All nodes other than self.head are guaranteed to have non-None previous
  													assert previous is not None
  
  													a_					=		node
  													a_					=		previous
  													a_					=		node
  													a_					=		self.rear
  													node.freq += 1
  													self._position_node(_UpperCAmelCase		)
  
  
  							def 						lowercase__     (   self			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													while node.prev is not None and node.prev.freq > node.freq:
  																			# swap node with previous node
  																			a_					=		node.prev
  
  																			a_					=		previous_node.prev
  																			a_					=		node.prev
  																			a_					=		previous_node
  																			a_					=		node
  
  
  
  
  
  
  							def 						lowercase__     (   self			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													if node.prev is None or node.next is None:
  																			return None
  
  													a_					=		node.next
  													a_					=		node.prev
  													a_					=		None
  													a_					=		None
  													return node
  
  
  
  
  
  class        lowercase_				( Generic[T, U]):
  							snake_case_        =		{}
  
  
  							def __init__(   self			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													a_					=		DoubleLinkedList()
  													a_					=		capacity
  													a_					=		0
  													a_					=		0
  													a_					=		0
  													a_					=		{}
  
  
  							def __repr__(   self		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													return (
  													    f"CacheInfo(hits={self.hits}, misses={self.miss}, "
  													    f"capacity={self.capacity}, current_size={self.num_keys})"
  													)
  
  
  							def __contains__(   self			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													return key in self.cache
  
  
  							def 						lowercase__     (   self			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													if key in self.cache:
  																			self.hits += 1
  																			a_					=		self.cache[key]
  																			a_					=		self.list.remove(self.cache[key]		)
  																			assert node == value_node
  
  																			# node is guaranteed not None because it is in self.cache
  																			assert node is not None
  																			self.list.add(_UpperCAmelCase		)
  																			return node.val
  													self.miss += 1
  													return None
  
  
  							def 						lowercase__     (   self			,    _UpperCAmelCase			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													if key not in self.cache:
  																			if self.num_keys >= self.capacity:
  																									# delete first node when over capacity
  																									a_					=		self.list.head.next
  
  																									# guaranteed to have a non-None first node when num_keys > 0
  																									# explain to type checker via assertions
  																									assert first_node is not None
  																									assert first_node.key is not None
  																									assert self.list.remove(_UpperCAmelCase		) is not None
  																									# first_node guaranteed to be in list
  
  																									del self.cache[first_node.key]
  																									self.num_keys -= 1
  																			a_					=		DoubleLinkedListNode(_UpperCAmelCase			,    _UpperCAmelCase		)
  																			self.list.add(self.cache[key]		)
  																			self.num_keys += 1
  
  													else:
  																			a_					=		self.list.remove(self.cache[key]		)
  																			assert node is not None  # node guaranteed to be in list
  																			a_					=		value
  																			self.list.add(_UpperCAmelCase		)
  
  
  
  
  
  
  							@classmethod
  							def 						lowercase__     (   cls			,    _UpperCAmelCase = 128		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													def cache_decorator_inner(_UpperCAmelCase		) -> Callable[..., U]:
  																			def cache_decorator_wrapper(*_UpperCAmelCase		) -> U:
  																									if func not in cls.decorator_function_to_instance_map:
  																															a_					=		LFUCache(_UpperCAmelCase		)
  
  																									a_					=		cls.decorator_function_to_instance_map[func].get(args[0]		)
  																									if result is None:
  																															a_					=		func(*_UpperCAmelCase		)
  																															cls.decorator_function_to_instance_map[func].put(args[0]			,    _UpperCAmelCase		)
  																									return result
  
  																			def cache_info() -> LFUCache[T, U]:
  																									return cls.decorator_function_to_instance_map[func]
  
  																			setattr(_UpperCAmelCase			,    """cache_info"""			,    _UpperCAmelCase		)  # noqa: B010
  
  																			return cache_decorator_wrapper
  
  													return cache_decorator_inner
  
  
  if __name__ == "__main__":
  	import doctest
  
  	doctest.testmod()
style_context: 
  
  
  import abc
  import copy
  import dataclasses
  from dataclasses import dataclass
  from typing import ClassVar, Dict, Type, TypeVar
  
  from ..features import Features
  
  
  A_    :					Tuple             =TypeVar("""T""", bound="""TaskTemplate""")
  
  
  
  
  
  @dataclass(frozen=UpperCamelCase__)
  class        lowercase_				( abc.ABC):
  
  
  
  
  
  
  							"""simple docstring"""
  
  
  
  
  
  
  
  							snake_case_        =		42
  							snake_case_        =		42
  							snake_case_        =		42
  
  
  							def 						lowercase__     (   self			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													return copy.deepcopy(self		)
  
  
  							@property
  							def 						lowercase__     (   self		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													return Features(**self.input_schema			,    **self.label_schema		)
  
  
  							@property
  							@abc.abstractmethod
  							def 						lowercase__     (   self		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													raise NotImplementedError
  
  
  
  
  
  
  							@classmethod
  							def 						lowercase__     (   cls			,    _UpperCAmelCase		):
  
  
  
  
  
  
  
  													"""simple docstring"""
  
  
  													a_					=		{f.name for f in dataclasses.fields(cls		)}
  													return cls(**{k: v for k, v in template_dict.items() if k in field_names}		)