encapsulating a global variable

[BlindAnagram]

On 25/02/2020 12:50, Musbur wrote:
> 
> Am 25.02.2020 13:38 schrieb BlindAnagram:
>> and I am wondering if it is possible to use a class something like
>>
>> class get_it(object):
>>
>>   seen = dict()
>>
>>   def __call__(piece):
>>     return seen[piece]
> 
> What happened when you tried it?

The nearest I got was:

-------------------------
class orientate(object):

  seen = defaultdict()
  @classmethod
  def do(self, piece, two_sided=False):
------------------------

which works but requires a change to the function call interface from
orientate(piece) to  orientate.do(piece).

I was hoping that repalcing the above with:

-------------------------
class orientate(object):

  seen = defaultdict()
  @classmethod
  def __call__(self, piece, two_sided=False):
------------------------

would eliminate the need for the 'do' but this gives the error:

builtins.TypeError: orientate() takes no arguments

  Brian