How to write a test practice system based on Python

def xuanze():
    global flag2
    if flag2==1:
        def insert():
            num=var1.get()
            question=var2.get()
            choice=var3.get()
            answer=var4.get()
            with open('d:\\练习系统\\练习三3.1.pickle','rb') as file:
                lst1=pickle.load(file)
            with open('d:\\练习系统\\练习三3.2.pickle','rb') as file:
                lst2=pickle.load(file)
            with open('d:\\练习系统\\练习三3.3.pickle','rb') as file:
                lst3=pickle.load(file)
            with open('d:\\练习系统\\练习三3.4.pickle','rb') as file:
                lst4=pickle.load(file)
            if num not in lst1:
                lst1.append(num)
                lst2.append(question)
                lst3.append(choice)
                lst4.append(answer)
                var5.set('录入成功')
            else:
                var5.set('录入失败')
            with open('d:\\练习系统\\练习三3.1.pickle','wb') as file:
                pickle.dump(lst1,file)
                file.close()
            with open('d:\\练习系统\\练习三3.2.pickle','wb') as file:
                pickle.dump(lst2,file)
                file.close()
            with open('d:\\练习系统\\练习三3.3.pickle','wb') as file:
                pickle.dump(lst3,file)
                file.close()
            with open('d:\\练习系统\\练习三3.4.pickle','wb') as file:
                pickle.dump(lst4,file)
                file.close()
        def delete():
            num=var1.get()
            question=var2.get()
            choice=var3.get()
            answer=var4.get()
            with open('d:\\练习系统\\练习三3.1.pickle','rb') as file:
                lst1=pickle.load(file)
            with open('d:\\练习系统\\练习三3.2.pickle','rb') as file:
                lst2=pickle.load(file)
            with open('d:\\练习系统\\练习三3.3.pickle','rb') as file:
                lst3=pickle.load(file)
            with open('d:\\练习系统\\练习三3.4.pickle','rb') as file:
                lst4=pickle.load(file)
            if num in lst1:
                t=lst1.index(num)
                lst1.pop(t)
                lst2.pop(t)
                lst3.pop(t)
                lst4.pop(t)
                var5.set('删除成功')
            else:
                var5.set('删除失败')
            with open('d:\\练习系统\\练习三3.1.pickle','wb') as file:
                pickle.dump(lst1,file)
                file.close()
            with open('d:\\练习系统\\练习三3.2.pickle','wb') as file:
                pickle.dump(lst2,file)
                file.close()
            with open('d:\\练习系统\\练习三3.3.pickle','wb') as file:
                pickle.dump(lst3,file)
                file.close()
            with open('d:\\练习系统\\练习三3.4.pickle','wb') as file:
                pickle.dump(lst4,file)
                file.close()

def tiankong():
    global flag2
    if flag2==1:
        def insert():
            num=var1.get()
            question=var2.get()
            answer=var3.get()
            with open('d:\\练习系统\\练习一1.1.pickle','rb') as file:
                lst1=pickle.load(file)
            with open('d:\\练习系统\\练习一1.2.pickle','rb') as file:
                lst2=pickle.load(file)
            with open('d:\\练习系统\\练习一1.3.pickle','rb') as file:
                lst3=pickle.load(file)
            if num not in lst1:
                lst1.append(num)
                lst2.append(question)
                lst3.append(answer)
                var4.set('录入成功')
            else:
                var4.set('录入失败')
            with open('d:\\练习系统\\练习一1.1.pickle','wb') as file:
                pickle.dump(lst1,file)
                file.close()
            with open('d:\\练习系统\\练习一1.2.pickle','wb') as file:
                pickle.dump(lst2,file)
                file.close()
            with open('d:\\练习系统\\练习一1.3.pickle','wb') as file:
                pickle.dump(lst3,file)
                file.close()
        def delete():
            num=var1.get()
            question=var2.get()
            answer=var3.get()
            with open('d:\\练习系统\\练习一1.1.pickle','rb') as file:
                lst1=pickle.load(file)
            with open('d:\\练习系统\\练习一1.2.pickle','rb') as file:
                lst2=pickle.load(file)
            with open('d:\\练习系统\\练习一1.3.pickle','rb') as file:
                lst3=pickle.load(file)
            if num in lst1:
                t=lst1.index(num)
                lst1.pop(t)
                lst2.pop(t)
                lst3.pop(t)
                var4.set('删除成功')
            else:
                var4.set('删除失败')
            with open('d:\\练习系统\\练习一1.1.pickle','wb') as file:
                pickle.dump(lst1,file)
                file.close()
            with open('d:\\练习系统\\练习一1.2.pickle','wb') as file:
                pickle.dump(lst2,file)
                file.close()
            with open('d:\\练习系统\\练习一1.3.pickle','wb') as file:
                pickle.dump(lst3,file)
                file.close()

def panduan():
    global flag2
    if flag2==1:
        def insert():
            num=var1.get()
            question=var2.get()
            answer=var3.get()
            with open('d:\\练习系统\\练习二2.1.pickle','rb') as file:
                lst1=pickle.load(file)
            with open('d:\\练习系统\\练习二2.2.pickle','rb') as file:
                lst2=pickle.load(file)
            with open('d:\\练习系统\\练习二2.3.pickle','rb') as file:
                lst3=pickle.load(file)
            if num not in lst1:
                lst1.append(num)
                lst2.append(question)
                lst3.append(answer)
                var4.set('录入成功')
            else:
                var4.set('录入失败')
            with open('d:\\练习系统\\练习二2.1.pickle','wb') as file:
                pickle.dump(lst1,file)
                file.close()
            with open('d:\\练习系统\\练习二2.2.pickle','wb') as file:
                pickle.dump(lst2,file)
                file.close()
            with open('d:\\练习系统\\练习二2.3.pickle','wb') as file:
                pickle.dump(lst3,file)
                file.close()
        def delete():
            num=var1.get()
            question=var2.get()
            answer=var3.get()
            with open('d:\\练习系统\\练习二2.1.pickle','rb') as file:
                lst1=pickle.load(file)
            with open('d:\\练习系统\\练习二2.2.pickle','rb') as file:
                lst2=pickle.load(file)
            with open('d:\\练习系统\\练习二2.3.pickle','rb') as file:
                lst3=pickle.load(file)
            if num in lst1:
                t=lst1.index(num)
                lst1.pop(t)
                lst2.pop(t)
                lst3.pop(t)
                var4.set('删除成功')
            else:
                var4.set('删除失败')
            with open('d:\\练习系统\\练习二2.1.pickle','wb') as file:
                pickle.dump(lst1,file)
                file.close()
            with open('d:\\练习系统\\练习二2.2.pickle','wb') as file:
                pickle.dump(lst2,file)
                file.close()
            with open('d:\\练习系统\\练习二2.3.pickle','wb') as file:
                pickle.dump(lst3,file)
                file.close()