code: 
  
  
  import importlib.metadata
  import subprocess
  import sys
  
  
  
  
  
  
  def 	UpperCAmelCase__(							_SCREAMING_SNAKE_CASE				:   Any = False   ):
  
  
  
  
  
  
  			"""simple docstring"""
  
  
  
  
  			__A=  False
  			if "IPython" in sys.modules:
  						__A=  'google.colab' in str(sys.modules['IPython'].get_ipython()   )
  
  			if in_colab:
  						if upgrade:
  									__A=  ['pip', 'install', '-U', 'torch']
  									subprocess.run(UpperCamelCase__,check=UpperCamelCase__   )
  						# get the current version of torch
  						__A=  importlib.metadata.version('torch'   )
  						__A=  torch_version[: torch_version.rindex('.'   )]
  						__A=  f"""https://storage.googleapis.com/tpu-pytorch/wheels/colab/torch_xla-{torch_version_trunc}-cp37-cp37m-linux_x86_64.whl"""
  						__A=  ['pip', 'install', xla_wheel]
  						subprocess.run(UpperCamelCase__,check=UpperCamelCase__   )
  			else:
  						raise RuntimeError('`install_xla` utility works only on google colab.'   )
  
  
  
  
style_context: 
  
  
  '''simple docstring'''
  
  
  
  
  
  from typing import Any
  class 	a__				:
  
  
  
  
  
  			'''simple docstring'''
  
  			def __init__(     self       : Any  )			->		int:
  						__A=  []
  						__A=  0
  			def __str__(     self       : Tuple  )			->		Dict:
  						__A=  '<' + str(self.stack  )[1:-1] + '>'
  						return printed
  			def 				lowerCAmelCase    (     self       : Tuple ,						lowerCAmelCase_       : Any  )			->		None:
  						self.stack.append(lowerCAmelCase_  )
  						__A=  self.length + 1
  			def 				lowerCAmelCase    (     self       : int  )			->		Any:
  						self.rotate(1  )
  						__A=  self.stack[self.length - 1]
  						__A=  self.stack[:-1]
  						self.rotate(self.length - 1  )
  						__A=  self.length - 1
  						return dequeued
  			def 				lowerCAmelCase    (     self       : Optional[int] ,						lowerCAmelCase_       : int  )			->		None:
  						for _ in range(lowerCAmelCase_  ):
  									__A=  self.stack[0]
  									__A=  self.stack[1:]
  									self.put(lowerCAmelCase_  )
  									__A=  self.length - 1
  			def 				lowerCAmelCase    (     self       : Tuple  )			->		Any:
  						__A=  self.get()
  						self.put(lowerCAmelCase_  )
  						self.rotate(self.length - 1  )
  						return front
  			def 				lowerCAmelCase    (     self       : Dict  )			->		int:
  						return self.length
  
  
  
  