boolean - Python 3 - Only numeric input -

i have trouble finishing python assignment. i'm using python 3.0 program asks user input set of 20 numbers, store them list, , perform calculation on output largest number, smallest, sum, , average.

right now, working, except 1 thing! in event of non numeric input user, program ask input again. have trouble doing that, thought of boolean variable, i'm not sure.

thanks lot help. here's code :

import time  #defining main function def main():     numbers = get_values()     get_analysis(numbers)  #defining function store values     def get_values():     print('welcome number analysis program!')     print('please enter series of 20 random numbers')     values =[]         in range(20):         value =(int(input("enter random number " + str(i + 1) + ": ")))         values.append(value)         #here store data list called "values"       return values  #defining function output numbers.  def get_analysis (numbers):      print(".................................")     print("the lowest number is:",  min(numbers))     time.sleep(1)     print("the highest number is:", max(numbers))     time.sleep(1)     print("the sum numbers is:", sum(numbers))     time.sleep(1)     print("the average numbers is:", sum(numbers)/len(numbers))     print(".................................")  main() 

vince

a couple of changes:

• added get_int() function prompts repeatedly until integer entered

• used simplify get_values() function

• added how_many parameter. follows "don't repeat yourself" principle - if want change number of items, can in 1 place

• moved "welcome program" message out of get_values main belongs

• don't capitalize every word or chuck norris you

• i renamed get_analysis() show_analysis() because prints result rather returning it; accurate function names important!

• i reduced analysis data-driven loop; more matter of taste else, think cleaner , easier understand, number of tests increases, , contributes don't repeat yourself

and final result:

import time  def get_int(prompt):     while true:         try:             return int(input(prompt))         except valueerror:             # couldn't parse int             pass  def get_values(how_many):     return [get_int("enter #{}: ".format(i)) in range(1, how_many+1)]  def average(lst):     return sum(lst) / len(lst)  def show_analysis(numbers):     tests = [         ("the lowest value is", min),         ("the highest value is", max),         ("the sum is", sum),         ("the average is", average)     ]     print(".................................")     label,fn in tests:         print("{} {}".format(label, fn(numbers)))         time.sleep(.5)     print(".................................")  def main():     how_many = 20     print("welcome number analysis program!")     print("please enter {} integers".format(how_many))     numbers = get_values(how_many)     show_analysis(numbers)  main()