code: 
  
  """simple docstring"""
  
  
  
  
  from .balanced_parentheses import balanced_parentheses
  from .stack import Stack
  
  
  
  def 						__a      (  a					):
  
  
  
  
  
         """simple docstring"""
  
  
  
  
  
  
  
         return {"+": 1, "-": 1, "*": 2, "/": 2, "^": 3}.get(a,		-1					)
  
  
  
  def 						__a      (  a					):
  
  
  
  
  
         """simple docstring"""
  
  
  
  
  
  
  
         if not balanced_parentheses(a					):
                raise ValueError("Mismatched parentheses"					)
         _a          =				Stack()
         _a          =				[]
         for char in expression_str:
                if char.isalpha() or char.isdigit():
                       postfix.append(a					)
                elif char == "(":
                       stack.push(a					)
                elif char == ")":
                       while not stack.is_empty() and stack.peek() != "(":
                              postfix.append(stack.pop()					)
                       stack.pop()
                else:
                       while not stack.is_empty() and precedence(a					) <= precedence(stack.peek()					):
                              postfix.append(stack.pop()					)
                       stack.push(a					)
         while not stack.is_empty():
                postfix.append(stack.pop()					)
         return " ".join(a					)
  
  
  if __name__ == "__main__":
     from doctest import testmod
  
     testmod()
     __SCREAMING_SNAKE_CASE					=						'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: 
  
  
  """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
  