(self, symbol)
On subscribe, this data will come down. Wait for it.
On subscribe, this data will come down. Wait for it.
On subscribe this data will come down . Wait for it .
def __wait_for_symbol(self, symbol):
        '''On subscribe, this data will come down. Wait for it.'''
        while not {'instrument', 'trade', 'quote'} <= set(self.data):
            sleep(0.1)
def __wait_for_symbol ( self , symbol ) : while not { 'instrument' , 'trade' , 'quote' } <= set ( self . data ) : sleep ( 0.1 )