code: 
  
  
  from .balanced_parentheses import balanced_parentheses
  from .stack import Stack
  
  
  
  
  
  
  def   __lowerCamelCase	(       lowerCamelCase__		:	str			):
  
  
  
  
  
  			'''simple docstring'''
  
  
  
  
  			return {"+": 1, "-": 1, "*": 2, "/": 2, "^": 3}.get(lowerCamelCase__     ,       -1			)
  
  
  
  
  
  
  def   __lowerCamelCase	(       lowerCamelCase__		:	str			):
  
  
  
  
  
  			'''simple docstring'''
  
  
  
  
  			if not balanced_parentheses(lowerCamelCase__			):
  						raise ValueError("""Mismatched parentheses"""			)
  			lowerCamelCase								=     Stack()
  			lowerCamelCase								=     []
  			for char in expression_str:
  						if char.isalpha() or char.isdigit():
  									postfix.append(lowerCamelCase__			)
  						elif char == "(":
  									stack.push(lowerCamelCase__			)
  						elif char == ")":
  									while not stack.is_empty() and stack.peek() != "(":
  												postfix.append(stack.pop()			)
  									stack.pop()
  						else:
  									while not stack.is_empty() and precedence(lowerCamelCase__			) <= precedence(stack.peek()			):
  												postfix.append(stack.pop()			)
  									stack.push(lowerCamelCase__			)
  			while not stack.is_empty():
  						postfix.append(stack.pop()			)
  			return " ".join(lowerCamelCase__			)
  
  
  if __name__ == "__main__":
  		from doctest import testmod
  
  		testmod()
  		UpperCAmelCase      :						List[str]    =		"a+b*(c^d-e)^(f+g*h)-i"
  
  		print("Infix to Postfix Notation demonstration:\n")
  		print("Infix notation: " + expression)
  		print("Postfix notation: " + infix_to_postfix(expression))
  
  
style_context: 
  
  
  import unittest
  
  from cer import CER
  
  
  UpperCAmelCase      :						Union[str, Any]    =		CER()
  
  
  
  
  
  
  
  class 					__lowercase					(       unittest.TestCase     ):
  
  
  
  		"""simple docstring"""
  
  		def 				__A      (   self  )     ->   Optional[int]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""White House"""]
  					lowerCamelCase								=     ["""white house"""]
  					# S = 2, D = 0, I = 0, N = 11, CER = 2 / 11
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.1818181818  ) < 1e-6  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   List[str]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""were wolf"""]
  					lowerCamelCase								=     ["""werewolf"""]
  					# S = 0, D = 0, I = 1, N = 9, CER = 1 / 9
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.1111111  ) < 1e-6  )
  
  					lowerCamelCase								=     ["""werewolf"""]
  					lowerCamelCase								=     ["""weae     wolf"""]
  					# S = 1, D = 1, I = 0, N = 8, CER = 0.25
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.25  ) < 1e-6  )
  
  					# consecutive whitespaces case 1
  					lowerCamelCase								=     ["""were wolf"""]
  					lowerCamelCase								=     ["""were               wolf"""]
  					# S = 0, D = 0, I = 0, N = 9, CER = 0
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.0  ) < 1e-6  )
  
  					# consecutive whitespaces case 2
  					lowerCamelCase								=     ["""were   wolf"""]
  					lowerCamelCase								=     ["""were               wolf"""]
  					# S = 0, D = 0, I = 0, N = 9, CER = 0
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.0  ) < 1e-6  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   str:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""werewolf"""]
  					lowerCamelCase								=     ["""weaewolf"""]
  					# S = 1, D = 0, I = 0, N = 8, CER = 0.125
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.125  ) < 1e-6  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   Tuple:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""werewolf"""]
  					lowerCamelCase								=     ["""wereawolf"""]
  					# S = 0, D = 1, I = 0, N = 8, CER = 0.125
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.125  ) < 1e-6  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   List[Any]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""werewolf"""]
  					lowerCamelCase								=     ["""wereolf"""]
  					# S = 0, D = 0, I = 1, N = 8, CER = 0.125
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.125  ) < 1e-6  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   Tuple:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""werewolf"""]
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertEqual(A		,			0.0  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   List[str]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""werewolf""", """I am your father"""]
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertEqual(A		,			0.0  )
  
  					lowerCamelCase								=     ["""werewolf""", """I am your father""", """doge"""]
  					lowerCamelCase								=     ["""werxwolf""", """I       am your father""", """doge"""]
  					# S = 1, D = 0, I = 0, N = 28, CER = 1 / 28
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.03571428  ) < 1e-6  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   List[Any]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""My hovercraft""", """is full of eels"""]
  					lowerCamelCase								=     ["""My hovercraft is full""", """ of eels"""]
  					# S = 0, D = 0, I = 2, N = 28, CER = 2 / 28
  					# whitespace at the front of " of eels" will be strip during preporcessing
  					# so need to insert 2 whitespaces
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A		,			concatenate_texts=A  )
  					self.assertTrue(abs(char_error_rate - 0.071428  ) < 1e-6  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   Optional[int]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     ["""我能吞下玻璃而不伤身体"""]
  					lowerCamelCase								=     [""" 能吞虾玻璃而 不霜身体啦"""]
  					# S = 3, D = 2, I = 0, N = 11, CER = 5 / 11
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.4545454545  ) < 1e-6  )
  
  					lowerCamelCase								=     ["""我能吞下玻璃""", """而不伤身体"""]
  					lowerCamelCase								=     ["""我    能 吞 下 玻 璃""", """而不伤身体"""]
  					# S = 0, D = 5, I = 0, N = 11, CER = 5 / 11
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertTrue(abs(char_error_rate - 0.454545454545  ) < 1e-6  )
  
  					lowerCamelCase								=     ["""我能吞下玻璃而不伤身体"""]
  					lowerCamelCase								=     cer.compute(predictions=A		,			references=A  )
  					self.assertFalse(A		,			0.0  )
  
  
  
  
  
  
  
  		def 				__A      (   self  )     ->   Optional[int]:
  
  
  
  
  
  
  
  					'''simple docstring'''
  
  
  
  
  
  
  
  					lowerCamelCase								=     [""""""]
  					lowerCamelCase								=     ["""Hypothesis"""]
  					with self.assertRaises(A  ):
  								cer.compute(predictions=A		,			references=A  )
  
  
  if __name__ == "__main__":
  		unittest.main()
  
  