an oop question

[Weatherby,Gerard]

I think:

class Stack:
    def __init__( self, *args ):
        self.data = args

    def __str__( self ):
        return f"Stack({','.join(str(x) for x in self.data)})"

gives equivalent output for the if len(args) is 0 or 2, if it’s okay for self.data to be a tuple.

class Stack:
    def __init__( self, *args ):
        self.data = list(args)

    def __str__( self ):
        return f"Stack({','.join(str(x) for x in self.data)})"

If it’s desired self.data be a list.


From: Python-list <python-list-bounces+gweatherby=uchc.edu at python.org> on behalf of Stefan Ram <ram at zedat.fu-berlin.de>
Date: Tuesday, November 1, 2022 at 3:43 PM
To: python-list at python.org <python-list at python.org>
Subject: Re: an oop question
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Julieta Shem <jshem at yaxenu.org> writes:
>clarify.  If I wish for an empty stack, I wish I could just say
>>>> Stack()
>Stack()
>and if I wish for a nonempty stack, I'd write
>>>> Stack(1, Stack(2, Stack(3, Stack())))
>Stack(1, Stack(2, Stack(3, Stack())))

  If this is all,

  main.py

class Stack:
    def __init__( self, *args ):
        self.data = [ args[ 0 ], args[ 1 ]]if len( args ) else []
    def __str__( self ):
        if len( self.data ):
            return f"Stack({self.data[0]}, {self.data[1]})"
        else:
            return f"Stack()"

print( Stack() )

print( Stack(1, Stack(2, Stack(3, Stack()))) )

  output

Stack()
Stack(1, Stack(2, Stack(3, Stack())))

  .


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