How to put ros subscribers in a for loop?

edit

I have multiple edges from where I'm collecting data from. I currently have only 3 edges, but wish to expand their number in future. In order to adopt that flexibility, how can I make a for loop for multiple rostopics which are indexed e1/ .. e2/... e3/.. and so on

current running code is below that I want to put in a for loop and have a single callback function.

    self.e1_sub = rospy.Subscriber('/e1/edge_data', Edgedata, self.callback_e1)
    self.e2_sub = rospy.Subscriber('/e2/edge_data', Edgedata, self.callback_e2)
    self.e3_sub = rospy.Subscriber('/e3/edge_data', Edgedata, self.callback_e3)