Print Distinct Numbers

# -*- coding: utf-8 -*-
"""
Larry McQuaid
MET CS 521
9/29/18
Homework 4, Question 10.5
Print distinct numbers
"""

try:
    user_input = input('Enter ten numbers: ')
    
    numbers = user_input.split(' ') #Separating numbers by spaces
    list1 = [int(x) for x in numbers] #Converting entries to integers
    list2 = [] #Establishing list 2
    
    
    #Adding unique numbers from list 1 to list 2 if they are not already present
    for user_num in list1:
        if user_num not in list2:
            list2.append(user_num)
    
    #Create string to remove the [] brackets that are present in outputs for lists
    list_string = ' ' .join(str(unique_list) for unique_list in list2)
    
    print('The distinct numbers are: {}' .format(list_string))
        
except:
    print('Please enter a valid number')