Not Getting The desired output on my system

[Rashi]

from tkinter import *
import random

class ExamGuru:
    def _init_(self, parent):
        self.parent=parent
        self.index=0
        self.question_num=1
        self.score=0
        self.questions=[Question("First Insurance Company In India ? ", "Oreintal Life Insurance",["Bombay Mutual Insurance","Western India Insurance","LIC"]),
                        Question("Which Of The Following Risks Are Insurable ?", "Financial Risk",["Non Financial","Both","None"])]

        self.mainquestionframe= Frame(parent, bg="orange", width=800, height=500)
        self.mainquestionframe.pack_propagate(0)
        self.mainquestionframe.pack(pady=5)

        self.headingframe= Frame(self.mainquestionframe, bg="blue",Width=800, height=40)
        self.headingframe.pack_propagate()
        self.headingframe.pack(pady=5)


class Question:
    def _init_(self,question,answer,dummies):
        self.question=question
        self.answer=answer
        self.dummies=dummies
        self.set_answers()

    def set_answers(self):
        self.answers=self.dummies
        self.answer.insert(random.randrange(len(self.dummies)+1), self.answer)


if __name__=='__main__':
    root=Tk()
    
    root.title("Exam Guru")
    root.mainloop()

not getting any anything on the tkinter window
system- ubuntu 14.04
python version - 3.4.3