Question

PYTHON BEGINNER Problem
Write a program which, given a number, simulates rolling a pair of six-sided dice that number of times. The program should keep track of how many times each possible sum comes up using a list. The list's first element should contain how many times a total of 2 was rolled, the second should contain how many times a total of 3 was rolled, and so on all the way through to 12. When all rolls are complete, the program should output the resulting list as well as a chart as shown in the example below, where the number of asterisks represents the number of times that roll came up (results will vary with each run). In this example, the user requested the dice be rolled 100 times:

Resulting list: [2, 8, 11, 11, 15, 15, 17, 9, 7, 4, 1]                                       

Resulting chart:

2   **                                                                                                           
3   ********                                                                                                     
4   ***********                                                                                                  
5   ***********                                                                                                  
6   ***************                                                                                              
7   ***************                                                                                              
8   *****************                                                                                            
9   *********                                                                                                    
10  *******                                                                                                      
11  ****                                                                                                         
12  *   
Input validation: Do not accept a non-integer input for the number of dice rolls to simulate.

Function decomposition
A function get_number_of_rolls that asks the user for the number of rolls and returns it as an integer. If the user enters a non-integer input, the function should output an error and ask again until a valid input is given (hint: use the isdigit string method.)
A function roll_dice that returns an integer representing the result (sum) of rolling two dice. Import the random module at the top of your program and use the call random.randint(1, 6) to simulate a single six-sided dice.
A function create_histogram that, given an integer number of rolls to simulate, returns a histogram represented as a list of 11 elements with the count of each roll result (i.e. the element at index zero contains the number of times 2 came up, the element at index 1 contains the number of times 3 came up, and so on. See the "Resulting list" in the example above.
A function print_histogram that, given a histogram represented as a list of 11 elements, displays the "Resulting chart histogram to the console as in the example above. Use the "\t" character to print a tab after each number in the line so the asterisks appear aligned.
A main function to drive the program.

Answer 1

Source Code:

import random
def get_number_of_rolls():
n=input("Enter number of rolls: ")
while(n.isdigit()==False):
print("Error, please input a valid positive integer.")
n=input("Enter number of rolls: ")
return n

def roll_dice():
dice1=random.randint(1,6)
dice2=random.randint(1,6)
return (dice1+dice2)

def create_histogram(n):
histogram=[]
rolls=[]
for i in range(0,int(n)):
sum_dice=roll_dice()
rolls.append(sum_dice)
for i in range(2,13):
histogram.append(rolls.count(i))
return histogram

def print_histogram(histogram):
star="*"
for i in range(0,len(histogram)):
print((i+2),"\t",star*histogram[i])

n=get_number_of_rolls()
histogram=create_histogram(n)
print_histogram(histogram)

Sample input and output: