Q:

How to restart the big loop (inside it 2 others small loops)

So i have this program and it works (mathematically) even though the user can use it without problem. The only matter is, in the end when the program asks the user to quit or to restart it dosen't ! 
So how can i restart the game !!!
Thank you all for your help 
print('guess what number im thinking of\n')
Max=int(input('Give us your hights number that your interval can have:')) 
Min=0
print'Now think to a number between 0 and',Max,'once you have chose your numebr'
print'Great !'
print'its your turn to help us,if the number is :Exacte (0),higher(1)or lower(-1)'
milieu=(Max-Min)/2
print int(milieu),'is that the number your thinking of ?'
z=input(str('its important that you only answer by 0, 1 or -1:'))
x=False 
while milieu<Max and x==False: 
    if z==0:                  
        print('We had guess what number you chosed')
        x=True
    while z!=0:   
        if z==1: 
            x=False
            Min=milieu  
            milieu=milieu+((Max-Min)/2)   
            print(int(milieu))
            z=input('its important that you only answer by E, G or P:') 
        if z==-1:
            x=False
            Max=milieu  
            milieu=(milieu-((Max-Min)/2))
            print(int(milieu))
            z=input('its important that you only answer by E, G or P:')
            break
while x==True:
    a=input('[5] to go out game\nor [9] to restart:')
    if a==5: break 
    print ("restart")
    if a==9: 
        x=False

A:

1) You are getting a string from the input function, you should cast it to an int.
2) You should use a function to achieve your objective
def game():
   ... # all the code for your game that you posted

if __name__ == "__main__":
   while True:
     game()
     response = int(raw_input('[5] to go out game\nor [9] to restart:'))
     if response != 9:
       break

