Python - sorting example

### create list with 3 elements
### but you could create empty list `num = []` and later use `num.append(value)`

#num = [x for x in range(3)]
num = range(3)

### default value to get into `while`

answer = 'y'

### repeat till someone answers something different then `y`
#while(answer == 'y'):  # doesn't need ()
while answer == 'y':

    ### ask for 3 number
    for i in range(3):
        # ask for number, convert answer from text to integer, put number on list
        num[i] = int(raw_input("Enter any value for num["+ str(i) +"] : "))

        # if you use empty list you could use `num.append( int(raw_input(...) )`


    for z in range(3):
        for x in range(3):
        #if(x <= 1):  # doesn't need ()
        if x <= 1:
            #if(num[x+1] > num[x]):  # doesn't need ()
            if num[x+1] > num[x]:
                ### replace numbers
                #ix = num[x]
                #num[x] = num[x+1]
                #num[x+1] = ix
                num[x], num[x+1] = num[x+1], num[x] # pythonic method

    print()

    ### display list elements
    #for u in range(3):
    #   print(num[u])

    for element in num: # pythonic method
        print(element)

    ### ask question and remember answer
    answer = raw_input("Try again [y/n] : ")

    ### automaticaly return to `while` with new value in `answer`