11class Stack :
2- class EmptyStackError (Exception ):
2+ class __EmptyStackError (Exception ):
33 def __str__ (self ) -> str :
44 return "Stack is empty."
55
@@ -21,7 +21,7 @@ def is_empty(self) -> bool:
2121
2222 def top (self ) -> object :
2323 if self .is_empty ():
24- raise Stack .EmptyStackError
24+ raise Stack .__EmptyStackError
2525 return self ._data [- 1 ]
2626
2727 def push (self , element : object ) -> None :
@@ -30,21 +30,25 @@ def push(self, element: object) -> None:
3030
3131 def pop (self ) -> object :
3232 if self .is_empty ():
33- raise Stack .EmptyStackError
33+ raise Stack .__EmptyStackError
3434 self ._size -= 1
3535 return self ._data .pop ()
3636
37+ def empty_stack (self ) -> None :
38+ while not self .is_empty ():
39+ self .pop ()
40+ 3741
3842if __name__ == '__main__' :
3943 stack = Stack ()
4044 print (stack .is_empty ())
4145 for i in range (10 ):
4246 stack .push (i )
4347 print (stack .top ())
48+ print (stack .pop ())
4449 print (stack )
4550 print (len (stack ))
4651 print (stack .length ())
4752 print (stack .is_empty ())
48- for i in range (10 ):
49- print (stack .pop ())
53+ stack .empty_stack ()
5054 print (stack .is_empty ())
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