
def   lowerCamelCase__							(					a      )      ->   List[str]:
   _A:  Any					=       []
   _A:  Optional[Any]					=       []
   _A:  Union[str, Any]					=       {
       '''^''': 3,
       '''*''': 2,
       '''/''': 2,
       '''%''': 2,
       '''+''': 1,
       '''-''': 1,
   }  # Priority of each operator
   _A:  int					=       len(a      ) if (len(a      ) > 7) else 7

   # Print table header for output
   print(
       '''Symbol'''.center(8      )		,		'''Stack'''.center(a      )		,		'''Postfix'''.center(a      )		,		sep=''' | '''		,		)
   print('''-''' * (print_width * 3 + 7)      )

   for x in infix:
      if x.isalpha() or x.isdigit():
         post_fix.append(a      )  # if x is Alphabet / Digit, add it to Postfix
      elif x == "(":
         stack.append(a      )  # if x is "(" push to Stack
      elif x == ")":  # if x is ")" pop stack until "(" is encountered
         while stack[-1] != "(":
            post_fix.append(stack.pop()      )  # Pop stack & add the content to Postfix
         stack.pop()
      else:
         if len(a      ) == 0:
            stack.append(a      )  # If stack is empty, push x to stack
         else:  # while priority of x is not > priority of element in the stack
            while len(a      ) > 0 and priority[x] <= priority[stack[-1]]:
               post_fix.append(stack.pop()      )  # pop stack & add to Postfix
            stack.append(a      )  # push x to stack

      print(
          x.center(8      )		,		(''''''.join(a      )).ljust(a      )		,		(''''''.join(a      )).ljust(a      )		,		sep=''' | '''		,		)  # Output in tabular format

   while len(a      ) > 0:  # while stack is not empty
      post_fix.append(stack.pop()      )  # pop stack & add to Postfix
      print(
          ''' '''.center(8      )		,		(''''''.join(a      )).ljust(a      )		,		(''''''.join(a      )).ljust(a      )		,		sep=''' | '''		,		)  # Output in tabular format

   return "".join(a      )  # return Postfix as str






def   lowerCamelCase__							(					a      )      ->   Tuple:
   _A:  Union[str, Any]					=       list(infix[::-1]      )  # reverse the infix equation

   for i in range(len(a      )      ):
      if infix[i] == "(":
         _A:  Union[str, Any]					=       ''')'''  # change "(" to ")"
      elif infix[i] == ")":
         _A:  Any					=       '''('''  # change ")" to "("

   return (infix_2_postfix(''''''.join(a      )      ))[
       ::-1
   ]  # call infix_2_postfix on Infix, return reverse of Postfix


if __name__ == "__main__":
   UpperCAmelCase__		:     Optional[int]     			=      input('\nEnter an Infix Equation = ')  # Input an Infix equation
   UpperCAmelCase__		:     Optional[Any]     			=      ''.join(Infix.split())  # Remove spaces from the input
   print('\n\t', Infix, '(Infix) -> ', infix_2_prefix(Infix), '(Prefix)')





from dataclasses import dataclass, field
from typing import ClassVar, Dict

from ..features import Features, Sequence, Value
from .base import TaskTemplate






@dataclass(frozen=SCREAMING_SNAKE_CASE__   )
class UpperCAmelCase   (						SCREAMING_SNAKE_CASE__   ):





   '''simple docstring'''
   # `task` is not a ClassVar since we want it to be part of the `asdict` output for JSON serialization
   __UpperCamelCase		:    str 				=    field(default='''question-answering-extractive'''							,							metadata={'''include_in_asdict_even_if_is_default''': True}   )
   __UpperCamelCase		:    ClassVar[Features] 				=    Features({'''question''': Value('''string'''   ), '''context''': Value('''string'''   )}   )
   __UpperCamelCase		:    ClassVar[Features] 				=    Features(
       {
           '''answers''': Sequence(
               {
                   '''text''': Value('''string'''   ),
                   '''answer_start''': Value('''int32'''   ),
               }   )
       }   )
   __UpperCamelCase		:    str 				=    "question"
   __UpperCamelCase		:    str 				=    "context"
   __UpperCamelCase		:    str 				=    "answers"


   @property
   def  __magic_name__				(					self     :							List[str]     ):

      """simple docstring"""
      return {self.question_column: "question", self.context_column: "context", self.answers_column: "answers"}



