![]() ![]() You then learned how to use a Python for loop to generate a list of all combinations of a string when repetition is allowed. You learned how to do this using the popular itertools library as well as using recursion. In this post, you learned how to use Python to generate a list of all permutations of a string. Want to learn more about Python for-loops? Check out my in-depth tutorial that takes your from beginner to advanced for-loops user! Want to watch a video instead? Check out my YouTube tutorial here. We can also see here that we have many times more combinations when we use repetition than if we do not. The code above can become quite resource intensive. In the code above, we use a for loop and a list comprehension to return all combinations of a Python string with repetition. Let’s take a look at an example, using the same string that we have used before, 'abc': # Use Python to get all combinations of a string with repetitionįinal_list = for x in final_list for y in i] This can be easily done using a Python for loop. In this section, you’ll learn how to use Python to get all permutations of a string with repetition. ![]() In the examples above, we used Python to find all combinations of a string without repetition. Permutations with Repetition of a String in Python Want to learn how to use the Python zip() function to iterate over two lists? This tutorial teaches you exactly what the zip() function does and shows you some creative ways to use the function. This method, however, is helpful for when you cannot use itertools for some reason. However, it is a bit less intuitive to follow along for beginner Python users, so perhaps using the itertools method might be preferred for readability. We can see that this returns the same as above. Words_list, words_list = words_list, words_list Let’s take a look at how this recursive method works to help find all combinations of a string in Python: # Getting all permutations of a string using recursion in Python ![]() The idea is that we backtrack for each possible combination that can exist. The concept we’ll use in recursion to create permutations is known as backtracking. Use Recursion in Python to Find All Permutations of a String More of a visual learner, check out my YouTube tutorial here. Want to learn more about Python list comprehensions? Check out this in-depth tutorial that covers off everything you need to know, with hands-on examples. In the next section, you’ll learn how to use recursion to find combinations of a string in Python.
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