





from __future__ import annotations

class    _UpperCAmelCase							:

      '''simple docstring'''





      def __init__(		self      ,       a__       ):
         A_     :				Optional[int]			      =	order

         # a_{0} ... a_{k}
         A_     :				Union[str, Any]			      =	[1.0] + [0.0] * order
         # b_{0} ... b_{k}
         A_     :				List[Any]			      =	[1.0] + [0.0] * order

         # x[n-1] ... x[n-k]
         A_     :				Any			      =	[0.0] * self.order
         # y[n-1] ... y[n-k]
         A_     :				str			      =	[0.0] * self.order
      def 		_lowerCamelCase      (		self      ,       a__      ,       a__       ):
         if len(a__       ) < self.order:
            A_     :				Dict			      =	[1.0, *a_coeffs]

         if len(a__       ) != self.order + 1:
            A_     :				List[Any]			      =	(
                F"""Expected a_coeffs to have {self.order + 1} elements """
                F"""for {self.order}-order filter, got {len(a__       )}"""
            )
            raise ValueError(a__       )

         if len(a__       ) != self.order + 1:
            A_     :				Union[str, Any]			      =	(
                F"""Expected b_coeffs to have {self.order + 1} elements """
                F"""for {self.order}-order filter, got {len(a__       )}"""
            )
            raise ValueError(a__       )

         A_     :				Union[str, Any]			      =	a_coeffs
         A_     :				List[Any]			      =	b_coeffs






      def 		_lowerCamelCase      (		self      ,       a__       ):
         A_     :				List[Any]			      =	0.0

         # Start at index 1 and do index 0 at the end.
         for i in range(1      ,       self.order + 1       ):
            result += (
                self.b_coeffs[i] * self.input_history[i - 1]
                - self.a_coeffs[i] * self.output_history[i - 1]
            )

         A_     :				Dict			      =	(result + self.b_coeffs[0] * sample) / self.a_coeffs[0]

         A_     :				int			      =	self.input_history[:-1]
         A_     :				str			      =	self.output_history[:-1]

         A_     :				Any			      =	sample
         A_     :				Tuple			      =	result

         return result













from typing import List

from .keymap import KEYMAP, get_character



def     _lowerCAmelCase		(  _lowerCAmelCase     ):
   '''simple docstring'''


   def decorator(_lowerCAmelCase     ):
      A_     :				List[Any]			      =	getattr(_lowerCAmelCase  ,"""handle_key"""  ,[]     )
      handle += [key]
      setattr(_lowerCAmelCase  ,"""handle_key"""  ,_lowerCAmelCase     )
      return func

   return decorator



def     _lowerCAmelCase		(  *_lowerCAmelCase     ):
   '''simple docstring'''


   def decorator(_lowerCAmelCase     ):
      A_     :				Tuple			      =	getattr(_lowerCAmelCase  ,"""handle_key"""  ,[]     )
      handle += keys
      setattr(_lowerCAmelCase  ,"""handle_key"""  ,_lowerCAmelCase     )
      return func

   return decorator

class    _UpperCAmelCase							(		_lowerCamelCase     ):
      def __new__(		cls      ,       a__      ,       a__      ,       a__       ):
         A_     :				Any			      =	super().__new__(cls      ,       a__      ,       a__      ,       a__       )
         if not hasattr(a__      ,       """key_handler"""       ):
            setattr(a__      ,       """key_handler"""      ,       {}       )
         setattr(a__      ,       """handle_input"""      ,       KeyHandler.handle_input       )

         for value in attrs.values():
            A_     :				Tuple			      =	getattr(a__      ,       """handle_key"""      ,       []       )
            for key in handled_keys:
               A_     :				Optional[Any]			      =	value
         return new_cls






      @staticmethod
      def 		_lowerCamelCase      (		cls       ):
         A_     :				List[str]			      =	get_character()
         if char != KEYMAP["undefined"]:
            A_     :				str			      =	ord(a__       )
         A_     :				List[str]			      =	cls.key_handler.get(a__       )
         if handler:
            A_     :				Optional[int]			      =	char
            return handler(cls       )
         else:
            return None






def     _lowerCAmelCase		(  cls     ):
   '''simple docstring'''


   return KeyHandler(cls.__name__  ,cls.__bases__  ,cls.__dict__.copy()     )






