code: 
  
  def 					__lowerCAmelCase			(  _A					):
  
  
  
  							"""simple docstring"""
  
  
  							if num < 0:
  														return -1
  							return 1 if num else 0
  
  
  def 					__lowerCAmelCase			(  ):
  
  
  
  							"""simple docstring"""
  
  
  							assert signum(5					) == 1
  							assert signum(-5					) == -1
  							assert signum(0					) == 0
  
  
  if __name__ == "__main__":
  				print(signum(12))
  				print(signum(-12))
  				print(signum(0))
  
  
  
style_context: def 					__lowerCAmelCase			(  _A					):
  
  
  
  							"""simple docstring"""
  
  
  							if len(_A					) <= 1:
  														return data
  							else:
  														return [
  														    *quick_sort([e for e in data[1:] if e <= data[0]]					),
  														    data[0],
  														    *quick_sort([e for e in data[1:] if e > data[0]]					),
  														]
  
  
  if __name__ == "__main__":
  				import doctest
  
  				doctest.testmod()
  
  
  