Generate a List of Random Numbers Without Duplicates in Python Last Updated : 27 Nov, 2024 Comments Improve Suggest changes Like Article Like Report There are a few ways to generate a list of random numbers without duplicates in Python. Let’s look at how we can generate a list of random numbers without any duplicates.Using random.sample()This random.sample() method allows us to generate a list of unique random numbers in a single step. Python import random # Generate 5 unique random numbers between 1 and 10 a = random.sample(range(1, 11), 5) print(a) Output[8, 3, 6, 10, 5] Other methods which can help us to generate list of random numbers without duplicates in python are:Table of ContentUsing random.shuffle()Using numpy's random.choice() with replace=FalseUsing while LoopUsing random.shuffle()A more advanced method is to generate a list of number then shuffle it and then pick the first few numbers. random.shuffle() method works well when we want to avoid using loops or manual checks. Python import random a = list(range(1, 11)) # Create a list of numbers from 1 to 10 random.shuffle(a) # Shuffle the list a = a[:5] # Get the first 5 numbers from the shuffled list print(a) Output[7, 8, 9, 5, 6] Using numpy's random.choice() with replace=FalseIf we are working with large arrays or need more advanced random number generation, we can use numpy. The random.choice() function can be used to select unique values if replace=False. Python import numpy as np # Generate 10 unique random numbers from 1 to 100 a = np.random.choice(range(1, 101), size=10, replace=False) print(a) Output[ 5 92 42 76 91 22 75 69 63 33] Using while LoopAnother simple way to generate random numbers without duplicates is by using a while loop to keep adding random numbers to a list until we have enough unique numbers. We can check for duplicates by using a set. Python import random a = [] while len(a) < 5: num = random.randint(1, 10) # Check if the number is already in the list if num not in a: a.append(num) print(a) Output[1, 2, 4, 6, 5] Comment More infoAdvertise with us Next Article Generate a List of Random Numbers Without Duplicates in Python P pragya22r4 Follow Improve Article Tags : Python Python Programs Practice Tags : python Similar Reads Python Tutorial | Learn Python Programming Language Python Tutorial â Python is one of the most popular programming languages. Itâs simple to use, packed with features and supported by a wide range of libraries and frameworks. Its clean syntax makes it beginner-friendly.Python is:A high-level language, used in web development, data science, automatio 10 min read Python Interview Questions and Answers Python is the most used language in top companies such as Intel, IBM, NASA, Pixar, Netflix, Facebook, JP Morgan Chase, Spotify and many more because of its simplicity and powerful libraries. 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