Python-random number and its frequency
Question: > The function `randint` from the random module can be used to produce random
> numbers. A call on `random.randint(1, 6)`, for example, will produce the
> values 1 to 6 with equal probability. Write a program that loops 1000 times.
> On each iteration it makes two calls on `randint` to simulate rolling a pair
> of dice. Compute the sum of the two dice, and record the number of times
> each value appears.
>
> The output should be two columns. One displays all the sums (i.e. from 2 to
> 12) and the other displays the sums' respective frequencies in 1000 times.

My code is shown below:

    
    
    import random
    freq=[0]*13
    
    for i in range(1000):
        Sum=random.randint(1,6)+random.randint(1,6)
        #compute the sum of two random numbers
        freq[sum]+=1
        #add on the frequency of a particular sum
    
    for Sum in xrange(2,13):
        print Sum, freq[Sum]
        #Print a column of sums and a column of their frequencies
    

However, I didn't manage to get any results.


Answer: You shouldn't use `Sum` because simple variables should not be capitalized.

You shouldn't use `sum` because that would shadow the built-in `sum()`.

Use a different non-capitalized variable name. I suggest `diceSum`; that's
also stating a bit about the context, the idea behind your program etc. so a
reader understands it faster.

You don't want to make any readers of your code happy? Think again. You asked
for help here ;-)

