Bottom Page

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
 How to make loop go back to the beginning if test evaluaes to True.
#1
Hi, im trying to make a program that generates random numbers using the randint function. With this function I want to generate numbers but they can't be repeated.

    def n_nonrepeated(q_of_nums, minimum_number, maximum_number):
        """Generates odd and even numbers, they can't be repeated."""
        printed_numbers = []
        for i in list(range(q_of_nums)):
            x = randint(minimum_number, maximum_number)
            if x in printed_numbers:
                x = randint(minimum_number, maximum_number)
                print(x, end=' ')
            else:
                print(x, end=' ')
                printed_numbers.append(x)
As you can see in the code the best thing that I thought of doing was adding a test that generates the number again if the number that as going to be printed has already been printed. This test only works one time as if one number is in printed_numbers it runs the code and generates another umber but then if that number is repeated it doesn't check again. So i wanted to know if it's possible to make the program return to the for loop so if the number generated has already been printed it has to generate another one and so on until it prints the requested quantity of numbers without repeating one.

Thanks for your help in advance. :D
Quote
#2
Use a set instead of a list:

def n_nonrepeated(q_of_nums, minimum_number, maximum_number):
    """Generates odd and even numbers, they can't be repeated."""
    printed_numbers = set()

    while len(printed_numbers) < q_of_nums:
        printed_numbers.add(randint(minimum_number, maximum_number))

    return printed_numbers
Please note that there is the possibility of an infinite loop with this. You may want to add some more logic to prevent that.
buran likes this post
Quote

Top Page

Possibly Related Threads...
Thread Author Replies Views Last Post
  Do break operators turn while loop conditions from True to False? Drone4four 5 218 Oct-24-2019, 07:11 PM
Last Post: newbieAuggie2019
  How to use while true/while loop on python christing 4 213 Oct-08-2019, 08:02 AM
Last Post: perfringo
  out and back to loop vlk 2 101 Oct-07-2019, 06:26 PM
Last Post: vlk
  Returning True or False vs. True or None trevorkavanaugh 6 523 Apr-04-2019, 08:42 AM
Last Post: DeaD_EyE
  file.write stops while true loop from executing in python3 boonr 3 394 Mar-25-2019, 12:50 PM
Last Post: ichabod801
  Returning true or false in a for loop bbop1232012 3 473 Nov-22-2018, 04:44 PM
Last Post: bbop1232012
  Get True of false outside a loop morgandebray 2 493 Aug-09-2018, 12:39 PM
Last Post: morgandebray
  Is this a normal/benign make test error when building python3.6 sofuego 2 1,076 Feb-12-2018, 12:32 AM
Last Post: sofuego
  How to Loop CSV File Beginning at Specific Row? bmccollum 5 24,865 Nov-05-2017, 11:04 PM
Last Post: bmccollum

Forum Jump:


Users browsing this thread: 1 Guest(s)