Подскажите, как передать атрибут или избавиться от global?

from pybass import *
 
class Play_URL:
 
    def pl(self, val_adr_set=''):
        global stream
 
        if not BASS_Init(-1, 44100, 0, 0, 0):
            print('           - BASS_Init error %s' % get_error_description(BASS_ErrorGetCode()))
        else:
            print('           - BASS_Init %s' % get_error_description(BASS_ErrorGetCode()))
            stream = BASS_StreamCreateURL(val_adr_set.encode('ASCII'), 0, 0, DOWNLOADPROC(), 0)
            print('%s - BASS_StreamCreateURL %s' % (repr(stream), get_error_description(BASS_ErrorGetCode())))
            BASS_ChannelPlay(stream, True)
            print('           - BASS_Channel play mixer %s' % get_error_description(BASS_ErrorGetCode()))
 
    def st(self):
        global stream
 
        print('%s - BASS_StreamCreateURL %s' % (repr(stream), get_error_description(BASS_ErrorGetCode())))
        BASS_StreamFree(stream)
        print('           - BASS_StreamFree %s' % get_error_description(BASS_ErrorGetCode()))
        BASS_Free()
        print('           - BASS_Free %s' % get_error_description(BASS_ErrorGetCode()))

class Play_URL:
    stream = 0
 
    def pl(self):
                    
        self.stream = 2*2
        return self.stream
 
    def st(self, ss):
        
        self.stream = ss
        return self.stream
 
res = Play_URL().pl()
print(Play_URL().st(res))

class Play_URL:
    def __init__(self):
        self.stream = 0