python - __init__() missing 1 required positional argument: 'Value' -

i don't understand wrong. keep getting i'm missing required positional argument.

class cointoss(object):      def __init__(self, flip, id_num, value):         self.flip = flip         self.id_num = id_num         self.value = value      def flip(self):         """         method important in determining number of flips , simulating coin         """         data = []         num_flip = int(input("how many times want flip coin? :"))         print("the ball @ start: ball: d%, state: d% value: d% " %(self.id_num))         in range(num_flip):             self.flip = self.flip = 1             if randint(0,1) == 0:                 self.value = self.value + 1                 data.append(self.value)              else:                 self.value = self.value - 1                 data.append(self.value) 

apparently, when use cointoss, call 2 arguments, flip , id_num. cause error, because did not provide cointoss.__init__() required value argument.