Make All Combinations of a Python List with Itertools | Permutations in Python | Anagram in Python

Key Takeaways

dear fellow coders welcome to one little coder in this python tutorial i'm going to quickly show you how you can create permutations of a list out of a string and this idea came from this movie that i was recently watching called enola homes one of the themes that they've got in that movie is you know anagrams that jump switching words and letters and then creating new sentences or new words so if you see this name enola which is the name of the title or character so it if you reverse it it becomes alone so i started thinking you know like how how can we do this in python then i came across this um amazing base amazing library that's part of your python like everybody has got it which makes it really really easy for you to make permutations and combinations like especially with the list so i'm going to show you quickly how to do that and we can see a couple of examples first from eater tools input i'm going to start with combinations okay and when you have combinations then you need a list right for now the first list that i'm going to use is name is equal to um a list which says e n o l a and you've got the name ready so now what we have to do is combinations require two arguments one is the actual list the second one is the number of items that you want to output number of elements that you want to deal with so first for that what we're going to do is we're going to say for i in the range of one to name length of name plus one which means like we want it straight from one till whatever the length is we're going to say that combinations of name comma i so this is going to take this list and it's going to take the number length and then it's going to give you a list so to make it simple i'm going to just print this i'm going to just print this as we go along so let me print this i think it won't work because this is an iterator you have to list it and then print and then when i say print or eta tools oh that's that's a bad way to call that library name so when you run this you can actually see that you know uh for every iteration so let me run this only for two iterations so you know what is actually happening so if i run this for two iterations you can see that you know e n o l a so that is that is there so if i run this for um three iterations oops and this for three you would see that it it goes like this it it takes this this this so you see a three letter uh list you see a two little list and you you just basically see this combination right of different um different con different combination of these letters as the name suggests but what if you actually want to do permutation here which is which is what that happens right where you you try to see um what happens when you try to find anagram of enola so that's what we want to do so for that instead of combinations we need actually permutations so i'm going to copy call permutations here and then instead of this i'm going to do it in a slightly different way because what permutations does is you don't need a for loop for that i mean if you have a for loop it's easy to print out but you don't need there is no length argument i'm going to just put the name here and then i'm going to save for um new pum pum in this and i'm going to print the new boom and when i print this this ideally wouldn't print because this is an iterator or let's see i think we are iterating on it right so it should ideally print so when i print this you can see alone on all these different options right now it wouldn't make a lot of sense because you know you can see that it is it's taking all these so let's quickly do a string join which means i have this empty text string and i want to join with everything that we find here so which means instead of seeing it like this you would see it as a word and when i do that when i run this you can actually see what happened okay so i think i added this here so when i run this you can actually see that i've got a loan i've got i've got different options loan loan so you've got a lot of these different options that you can get when you mix these laters um so right now what we are doing is we are taking the same five letters and trying to make this five letters jumble across all these options that's what permutation is but you can do it combination with the replacement combination without replacement just like we saw and this permutation which actually gives us the anagram so now if you use a library like nltk you can actually filter only those words that occur in english dictionary which means basically you can do anagram and then figure out what are those words like you can jumble across all these letters and then figure out what are those words that are present in english dictionary and just filter them out so you've got the perfect anagram tool um so i might probably create a web application for this this this looks like a nice idea but but yeah for now um if if you are interested in doing permutations or combinations in python you should definitely definitely look into eater tools so they've got a lot of these these amazing options for you to do these things these combinations permutations combinations with replacement in an efficient way and and also all right if it's part of your base python which means you don't you don't need any separate dependencies so yeah that that's it you can use it for a world you can use it for a lot of different things that people are really really interested in these days if you have any questions leave me in the comment section otherwise i would see you in the next video stay safe take