python 3.x - Why is my code not breaking out of my while loop? -

i have code display powers of two:

print ("how many powers of 2 see?") number=int(input()) values=[2] count=1 while count <=  number:     length=len(values)     index=length-1     number=values[index]*2     values.append(number)     count=count+1  print (values) 

my code updating value of count, won't break out of while loop.

you compare count <= number in every while loop, increase number faster count inside loop. don't touch number in loop, this:

print("how many powers of 2 see?") number = int(input())  values = [2] count = 1 while count <= number:     length = len(values)     index = length - 1     number_tmp = values[index]*2     values.append(number_tmp)     count += 1     print(values) 

but more pythonic way like:

print("how many powers of 2 see?") number = int(input())  values = [2**(n+1) n in range(number)]  print(values)