






def       snake_case_		(     lowerCAmelCase_       ,       lowerCAmelCase_       ,       lowerCAmelCase_       ,       lowerCAmelCase_       ,       lowerCAmelCase_      ):
							if index == number_of_items:
														return 0
							__lowercase      :							Optional[Any]				=     0
							__lowercase      :							int				=     0
							__lowercase      :							Any				=     knapsack(lowerCAmelCase_       ,       lowerCAmelCase_       ,       lowerCAmelCase_       ,       lowerCAmelCase_       ,       index + 1      )
							if weights[index] <= max_weight:
														__lowercase      :							str				=     values[index] + knapsack(
														    lowerCAmelCase_       ,       lowerCAmelCase_       ,       lowerCAmelCase_       ,       max_weight - weights[index]       ,       index + 1      )
							return max(lowerCAmelCase_       ,       lowerCAmelCase_      )


if __name__ == "__main__":
	import doctest

	doctest.testmod()







import logging
import os
import threading
import time


try:
	import warnings
except ImportError:
	lowerCamelCase : Any						   =       None

try:
	import msvcrt
except ImportError:
	lowerCamelCase : str						   =       None

try:
	import fcntl
except ImportError:
	lowerCamelCase : Optional[Any]						   =       None


# Backward compatibility
# ------------------------------------------------
try:
	TimeoutError
except NameError:
	lowerCamelCase : Union[str, Any]						   =       OSError


# Data
# ------------------------------------------------
lowerCamelCase : Tuple						   =       [
    '''Timeout''',
    '''BaseFileLock''',
    '''WindowsFileLock''',
    '''UnixFileLock''',
    '''SoftFileLock''',
    '''FileLock''',
]

lowerCamelCase : Tuple						   =       '''3.0.12'''


lowerCamelCase : Any						   =       None
def       snake_case_		(     ):
							global _logger
							__lowercase      :							List[str]				=     _logger or logging.getLogger(__name__      )
							return _logger

class 		lowerCAmelCase     ( __a			):

					'''simple docstring'''

					def __init__(  self				:	Any		,     __a				:	Any							)			->  List[Any]:


												"""simple docstring"""

												__lowercase      :							List[str]				=     lock_file
												return None



					def __str__(  self				:	str							)			->  Any:


												"""simple docstring"""

												__lowercase      :							Any				=     F"The file lock '{self.lock_file}' could not be acquired."
												return temp







class 		lowerCAmelCase     :

					'''simple docstring'''

					def __init__(  self				:	List[Any]		,     __a				:	Optional[int]							)			->  int:


												"""simple docstring"""

												__lowercase      :							Optional[Any]				=     lock
												return None



					def __enter__(  self				:	Dict							)			->  Dict:


												"""simple docstring"""

												return self.lock



					def __exit__(  self				:	Optional[int]		,     __a				:	Dict		,     __a				:	Any		,     __a				:	Tuple							)			->  Optional[Any]:


												"""simple docstring"""

												self.lock.release()
												return None







class 		lowerCAmelCase     :

					'''simple docstring'''

					def __init__(  self				:	Tuple		,     __a				:	Any		,     __a				:	Dict=-1		,     __a				:	Optional[Any]=None							)			->  Any:


												"""simple docstring"""

												__lowercase      :							Optional[int]				=     max_filename_length if max_filename_length is not None else 255
												# Hash the filename if it's too long
												__lowercase      :							Dict				=     self.hash_filename_if_too_long(__a		,     __a							)
												# The path to the lock file.
												__lowercase      :							Optional[Any]				=     lock_file

												# The file descriptor for the *_lock_file* as it is returned by the
												# os.open() function.
												# This file lock is only NOT None, if the object currently holds the
												# lock.
												__lowercase      :							int				=     None

												# The default timeout value.
												__lowercase      :							Optional[int]				=     timeout

												# We use this lock primarily for the lock counter.
												__lowercase      :							Optional[Any]				=     threading.Lock()

												# The lock counter is used for implementing the nested locking
												# mechanism. Whenever the lock is acquired, the counter is increased and
												# the lock is only released, when this value is 0 again.
												__lowercase      :							Union[str, Any]				=     0
												return None



					@property
					def       lowerCAmelCase				(  self				:	Optional[Any]							)			->  Optional[int]:


												"""simple docstring"""

												return self._lock_file



					@property
					def       lowerCAmelCase				(  self				:	Optional[int]							)			->  Optional[Any]:


												"""simple docstring"""

												return self._timeout



					@timeout.setter
					def       lowerCAmelCase				(  self				:	Tuple		,     __a				:	Tuple							)			->  Dict:


												"""simple docstring"""

												__lowercase      :							Tuple				=     float(__a							)
												return None



					def       lowerCAmelCase				(  self				:	Dict							)			->  Tuple:


												"""simple docstring"""

												raise NotImplementedError()



					def       lowerCAmelCase				(  self				:	Dict							)			->  Any:


												"""simple docstring"""

												raise NotImplementedError()



					@property
					def       lowerCAmelCase				(  self				:	Dict							)			->  List[Any]:


												"""simple docstring"""

												return self._lock_file_fd is not None



					def       lowerCAmelCase				(  self				:	Any		,     __a				:	Optional[Any]=None		,     __a				:	Union[str, Any]=0.05							)			->  List[str]:


												"""simple docstring"""

												if timeout is None:
																			__lowercase      :							Union[str, Any]				=     self.timeout

												# Increment the number right at the beginning.
												# We can still undo it, if something fails.
												with self._thread_lock:
																			self._lock_counter += 1

												__lowercase      :							int				=     id(self							)
												__lowercase      :							Optional[Any]				=     self._lock_file
												__lowercase      :							List[str]				=     time.time()
												try:
																			while True:
																										with self._thread_lock:
																																	if not self.is_locked:
																																								logger().debug(F"Attempting to acquire lock {lock_id} on {lock_filename}"							)
																																								self._acquire()

																										if self.is_locked:
																																	logger().debug(F"Lock {lock_id} acquired on {lock_filename}"							)
																																	break
																										elif timeout >= 0 and time.time() - start_time > timeout:
																																	logger().debug(F"Timeout on acquiring lock {lock_id} on {lock_filename}"							)
																																	raise Timeout(self._lock_file							)
																										else:
																																	logger().debug(
																																	    F"Lock {lock_id} not acquired on {lock_filename}, waiting {poll_intervall} seconds ..."							)
																																	time.sleep(__a							)
												except:  # noqa
																			# Something did go wrong, so decrement the counter.
																			with self._thread_lock:
																										__lowercase      :							Optional[int]				=     max(0		,     self._lock_counter - 1							)

																			raise
												return _Acquire_ReturnProxy(lock=self							)



					def       lowerCAmelCase				(  self				:	Union[str, Any]		,     __a				:	Optional[Any]=False							)			->  Optional[Any]:


												"""simple docstring"""

												with self._thread_lock:
																			if self.is_locked:
																										self._lock_counter -= 1

																										if self._lock_counter == 0 or force:
																																	__lowercase      :							Optional[Any]				=     id(self							)
																																	__lowercase      :							str				=     self._lock_file

																																	logger().debug(F"Attempting to release lock {lock_id} on {lock_filename}"							)
																																	self._release()
																																	__lowercase      :							List[str]				=     0
																																	logger().debug(F"Lock {lock_id} released on {lock_filename}"							)

												return None



					def __enter__(  self				:	Any							)			->  Optional[Any]:


												"""simple docstring"""

												self.acquire()
												return self



					def __exit__(  self				:	List[str]		,     __a				:	str		,     __a				:	int		,     __a				:	List[Any]							)			->  Tuple:


												"""simple docstring"""

												self.release()
												return None



					def __del__(  self				:	Optional[int]							)			->  Optional[int]:


												"""simple docstring"""

												self.release(force=__a							)
												return None



					def       lowerCAmelCase				(  self				:	Tuple		,     __a				:	str		,     __a				:	int							)			->  str:


												"""simple docstring"""

												__lowercase      :							List[Any]				=     os.path.basename(__a							)
												if len(__a							) > max_length and max_length > 0:
																			__lowercase      :							int				=     os.path.dirname(__a							)
																			__lowercase      :							List[str]				=     str(hash(__a							)							)
																			__lowercase      :							Optional[Any]				=     filename[: max_length - len(__a							) - 8] + """...""" + hashed_filename + """.lock"""
																			return os.path.join(__a		,     __a							)
												else:
																			return path







class 		lowerCAmelCase     ( __a			):

					'''simple docstring'''

					def __init__(  self				:	Union[str, Any]		,     __a				:	List[Any]		,     __a				:	Optional[int]=-1		,     __a				:	Tuple=None							)			->  List[Any]:


												"""simple docstring"""

												from .file_utils import relative_to_absolute_path

												super().__init__(__a		,     timeout=__a		,     max_filename_length=__a							)
												__lowercase      :							Tuple				=     """\\\\?\\""" + relative_to_absolute_path(self.lock_file							)



					def       lowerCAmelCase				(  self				:	Dict							)			->  Union[str, Any]:


												"""simple docstring"""

												__lowercase      :							List[str]				=     os.O_RDWR | os.O_CREAT | os.O_TRUNC

												try:
																			__lowercase      :							Tuple				=     os.open(self._lock_file		,     __a							)
												except OSError:
																			pass
												else:
																			try:
																										msvcrt.locking(__a		,     msvcrt.LK_NBLCK		,     1							)
																			except OSError:
																										os.close(__a							)
																			else:
																										__lowercase      :							Union[str, Any]				=     fd
												return None



					def       lowerCAmelCase				(  self				:	Any							)			->  List[Any]:


												"""simple docstring"""

												__lowercase      :							Optional[Any]				=     self._lock_file_fd
												__lowercase      :							int				=     None
												msvcrt.locking(__a		,     msvcrt.LK_UNLCK		,     1							)
												os.close(__a							)

												try:
																			os.remove(self._lock_file							)
												# Probably another instance of the application
												# that acquired the file lock.
												except OSError:
																			pass
												return None







class 		lowerCAmelCase     ( __a			):

					'''simple docstring'''

					def __init__(  self				:	List[str]		,     __a				:	Optional[Any]		,     __a				:	str=-1		,     __a				:	List[str]=None							)			->  Any:


												"""simple docstring"""

												__lowercase      :							Dict				=     os.statvfs(os.path.dirname(__a							)							).f_namemax
												super().__init__(__a		,     timeout=__a		,     max_filename_length=__a							)



					def       lowerCAmelCase				(  self				:	Optional[Any]							)			->  Dict:


												"""simple docstring"""

												__lowercase      :							List[Any]				=     os.O_RDWR | os.O_CREAT | os.O_TRUNC
												__lowercase      :							List[str]				=     os.open(self._lock_file		,     __a							)

												try:
																			fcntl.flock(__a		,     fcntl.LOCK_EX | fcntl.LOCK_NB							)
												except OSError:
																			os.close(__a							)
												else:
																			__lowercase      :							str				=     fd
												return None



					def       lowerCAmelCase				(  self				:	List[Any]							)			->  Optional[int]:


												"""simple docstring"""

												__lowercase      :							Any				=     self._lock_file_fd
												__lowercase      :							List[str]				=     None
												fcntl.flock(__a		,     fcntl.LOCK_UN							)
												os.close(__a							)
												return None







class 		lowerCAmelCase     ( __a			):

					'''simple docstring'''

					def       lowerCAmelCase				(  self				:	List[str]							)			->  Union[str, Any]:


												"""simple docstring"""

												__lowercase      :							Tuple				=     os.O_WRONLY | os.O_CREAT | os.O_EXCL | os.O_TRUNC
												try:
																			__lowercase      :							Union[str, Any]				=     os.open(self._lock_file		,     __a							)
												except OSError:
																			pass
												else:
																			__lowercase      :							Optional[int]				=     fd
												return None



					def       lowerCAmelCase				(  self				:	List[str]							)			->  Tuple:


												"""simple docstring"""

												os.close(self._lock_file_fd							)
												__lowercase      :							int				=     None

												try:
																			os.remove(self._lock_file							)
												# The file is already deleted and that's what we want.
												except OSError:
																			pass
												return None







lowerCamelCase : Optional[Any]						   =       None

if msvcrt:
	lowerCamelCase : List[Any]						   =       WindowsFileLock
elif fcntl:
	lowerCamelCase : List[Any]						   =       UnixFileLock
else:
	lowerCamelCase : Union[str, Any]						   =       SoftFileLock

	if warnings is not None:
		warnings.warn('''only soft file lock is available''')