怎么修改能让代码运行

class Comp():
def init(self,re=1,im=0):
self.__re=round(re,2)
self.__im=round(im,2)
def str(self):
pass############your code

def __gt__(self,other):
    pass############your code

def __lt__(self,other):
    pass############your code
def __ge__(self,other):
    pass############your code
def __le__(self,other):
    pass############your code
def __eq__(self,other):
    pass############your code
def __ne__(self,other):
    pass############your code
def __add__(self,other):
    pass############your code
def __add__(self,other):
    pass############your code
def __sub__(self,other):
    pass############your code

怎么修改能够让下面的代码运行
a=Comp(1,2)
b=Comp(1,2)
print(a)
print(b)
print(a+b)
print(a-b)
print(a>b)
print(a<b)
print(a>=b)
print(a<=b)
print(a==b)
print(a!=b)