code: 
  
  """simple docstring"""
  
  
  
  
  #
  # Sort large text files in a minimum amount of memory
  #
  import argparse
  import os
  
  
  
  
  
  class __snake_case		:
  
  
  
  
  
  
  
     """simple docstring"""
  
  
  
  
     lowerCAmelCase_				:   Tuple     	=			"block_{0}.dat"
  
  
  
  
     def __init__(		self							:Optional[int]				,  UpperCamelCase__							:str       ):
            _a          =				filename
            _a          =				[]
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:Tuple				,  UpperCamelCase__							:str				,  UpperCamelCase__							:Dict       ):
            _a          =				self.BLOCK_FILENAME_FORMAT.format(SCREAMING_SNAKE_CASE_       )
            with open(SCREAMING_SNAKE_CASE_				,  "w"       ) as file:
                   file.write(SCREAMING_SNAKE_CASE_       )
            self.block_filenames.append(SCREAMING_SNAKE_CASE_       )
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:str       ):
            return self.block_filenames
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:Any				,  UpperCamelCase__							:Dict				,  UpperCamelCase__							:List[str]=None       ):
            _a          =				0
            with open(self.filename       ) as file:
                   while True:
                          _a          =				file.readlines(SCREAMING_SNAKE_CASE_       )
  
                          if lines == []:
                                 break
  
                          if sort_key is None:
                                 lines.sort()
                          else:
                                 lines.sort(key=SCREAMING_SNAKE_CASE_       )
  
                          self.write_block("".join(SCREAMING_SNAKE_CASE_       )				,  SCREAMING_SNAKE_CASE_       )
                          i += 1
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:Optional[int]       ):
            map(os.remove				,  self.block_filenames       )
  
  
  
  
  
  
  class __snake_case		:
  
  
  
  
  
  
  
     """simple docstring"""
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:Optional[int]				,  UpperCamelCase__							:List[str]       ):
            _a          =				-1
            _a          =				None
  
            for i in range(len(SCREAMING_SNAKE_CASE_       )       ):
                   if min_str is None or choices[i] < min_str:
                          _a          =				i
  
            return min_index
  
  
  
  
  
  
  class __snake_case		:
  
  
  
  
  
  
  
     """simple docstring"""
  
  
  
  
     def __init__(		self							:List[str]				,  UpperCamelCase__							:Any       ):
            _a          =				files
            _a          =				set()
            _a          =				len(SCREAMING_SNAKE_CASE_       )
            _a          =				{i: None for i in range(self.num_buffers       )}
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:Union[str, Any]       ):
            return {
                i: self.buffers[i] for i in range(self.num_buffers       ) if i not in self.empty
            }
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:List[Any]       ):
            for i in range(self.num_buffers       ):
                   if self.buffers[i] is None and i not in self.empty:
                          _a          =				self.files[i].readline()
  
                          if self.buffers[i] == "":
                                 self.empty.add(SCREAMING_SNAKE_CASE_       )
                                 self.files[i].close()
  
            if len(self.empty       ) == self.num_buffers:
                   return False
  
            return True
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:List[Any]				,  UpperCamelCase__							:List[str]       ):
            _a          =				self.buffers[index]
            _a          =				None
  
            return value
  
  
  
  
  
  
  class __snake_case		:
  
  
  
  
  
  
  
     """simple docstring"""
  
  
  
  
     def __init__(		self							:Dict				,  UpperCamelCase__							:Union[str, Any]       ):
            _a          =				merge_strategy
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:List[Any]				,  UpperCamelCase__							:List[str]				,  UpperCamelCase__							:List[Any]				,  UpperCamelCase__							:Any       ):
            _a          =				FilesArray(self.get_file_handles(SCREAMING_SNAKE_CASE_				,  SCREAMING_SNAKE_CASE_       )       )
            with open(SCREAMING_SNAKE_CASE_				,  "w"				,  SCREAMING_SNAKE_CASE_       ) as outfile:
                   while buffers.refresh():
                          _a          =				self.merge_strategy.select(buffers.get_dict()       )
                          outfile.write(buffers.unshift(SCREAMING_SNAKE_CASE_       )       )
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:Optional[int]				,  UpperCamelCase__							:List[str]				,  UpperCamelCase__							:Tuple       ):
            _a          =				{}
  
            for i in range(len(SCREAMING_SNAKE_CASE_       )       ):
                   _a          =				open(filenames[i]				,  "r"				,  SCREAMING_SNAKE_CASE_       )  # noqa: UP015
  
            return files
  
  
  
  
  
  
  class __snake_case		:
  
  
  
  
  
  
  
     """simple docstring"""
  
  
  
  
     def __init__(		self							:Union[str, Any]				,  UpperCamelCase__							:List[Any]       ):
            _a          =				block_size
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:str				,  UpperCamelCase__							:Dict				,  UpperCamelCase__							:Dict=None       ):
            _a          =				self.get_number_blocks(SCREAMING_SNAKE_CASE_				,  self.block_size       )
            _a          =				FileSplitter(SCREAMING_SNAKE_CASE_       )
            splitter.split(self.block_size				,  SCREAMING_SNAKE_CASE_       )
  
            _a          =				FileMerger(NWayMerge()       )
            _a          =				self.block_size / (num_blocks + 1)
            merger.merge(splitter.get_block_filenames()				,  filename + ".out"				,  SCREAMING_SNAKE_CASE_       )
  
            splitter.cleanup()
  
  
  
  
     def SCREAMING_SNAKE_CASE_      (		self							:int				,  UpperCamelCase__							:Dict				,  UpperCamelCase__							:Optional[Any]       ):
            return (os.stat(SCREAMING_SNAKE_CASE_       ).st_size / block_size) + 1
  
  
  
  
  
  
  def 						__a      (  a					):
  
  
  
  
  
         """simple docstring"""
  
  
  
  
  
  
  
         if string[-1].lower() == "k":
                return int(string[:-1]					) * 1_0_2_4
         elif string[-1].lower() == "m":
                return int(string[:-1]					) * 1_0_2_4 * 1_0_2_4
         elif string[-1].lower() == "g":
                return int(string[:-1]					) * 1_0_2_4 * 1_0_2_4 * 1_0_2_4
         else:
                return int(snake_case__					)
  
  
  
  def 						__a      (  ):
  
  
  
  
  
         """simple docstring"""
  
  
  
  
  
  
  
         _a          =				argparse.ArgumentParser()
         parser.add_argument(
             "-m",		"--mem",		help="amount of memory to use for sorting",		default="100M"					)
         parser.add_argument(
             "filename",		metavar="<filename>",		nargs=1,		help="name of file to sort"					)
         _a          =				parser.parse_args()
  
         _a          =				ExternalSort(parse_memory(args.mem					)					)
         sorter.sort(args.filename[0]					)
  
  
  if __name__ == "__main__":
     main()
  
style_context: 
  
  
  """simple docstring"""
  
  
  
  
  from __future__ import annotations
  
  
  
  def 						__a      (  a,		a					):
  
  
  
  
  
         """simple docstring"""
  
  
  
  
  
  
  
         assert len(a					) == len(a					)
  
         _a          =				len(a					)
         _a          =				list(range(a					)					)
         _a          =				[-1] * n  # who the donor has donated to
         _a          =				[-1] * n  # who the recipient has received from
         _a          =				[0] * n
  
         while unmatched_donors:
                _a          =				unmatched_donors[0]
                _a          =				donor_pref[donor]
                _a          =				donor_preference[num_donations[donor]]
                num_donations[donor] += 1
                _a          =				recipient_pref[recipient]
                _a          =				rec_record[recipient]
  
                if prev_donor != -1:
                       if rec_preference.index(a					) > rec_preference.index(a					):
                              _a          =				donor
                              _a          =				recipient
                              unmatched_donors.append(a					)
                              unmatched_donors.remove(a					)
                else:
                       _a          =				donor
                       _a          =				recipient
                       unmatched_donors.remove(a					)
         return donor_record
  