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python Programming Glossary: permutationHow to generate all permutations of a list in Python http://stackoverflow.com/questions/104420/how-to-generate-all-permutations-of-a-list-in-python to generate all permutations of a list in Python How do you generate all the permutations.. of a list in Python How do you generate all the permutations of a list in Python independently of the type of elements in.. of the type of elements in that list. For example permutations permutations 1 1 permutations 1 2 1 2 2 1 permutations 1 2..
How can I “zip sort” parallel numpy arrays? http://stackoverflow.com/questions/1903462/how-can-i-zip-sort-parallel-numpy-arrays the trick. Here's how it works. First you need to find a permutation that sorts a. argsort is a method that computes this a numpy.array.. that this is right a p array 1 2 3 Now apply the same permutation to b. b numpy.array 4 6 2 b p array 2 4 6 share improve this..
counting combinations and permutations efficiently http://stackoverflow.com/questions/2096573/counting-combinations-and-permutations-efficiently combinations and permutations efficiently I have some code to count permutations and combinations.. and permutations efficiently I have some code to count permutations and combinations and I'm trying to make it work better for.. for large numbers. I've found a better algorithm for permutations that avoids large intermediate results but I still think I..
how to generate permutations of array in python? http://stackoverflow.com/questions/2124347/how-to-generate-permutations-of-array-in-python to generate permutations of array in python i have an array of 27 elements and i don't.. an array of 27 elements and i don't want to generate all permutations of array 27 i need 5000 randomly choosed permutations any tip.. all permutations of array 27 i need 5000 randomly choosed permutations any tip will be useful... python permutation share improve..
Python: using a recursive algorithm as a generator http://stackoverflow.com/questions/248830/python-using-a-recursive-algorithm-as-a-generator Here is an example. Suppose we want to compute all the permutations of a string with a recursive function. The following naive.. algorithm takes an extra argument 'storage' and appends a permutation to it whenever it finds one def getPermutations string storage.. prefix string i storage getPermutations abcd storage for permutation in storage print permutation Please don't care about inefficiency..
Maximal Length of List to Shuffle with Python random.shuffle? http://stackoverflow.com/questions/3062741/maximal-length-of-list-to-shuffle-with-python-random-shuffle Note that for even rather small len x the total number of permutations of x is larger than the period of most random number generators.. of most random number generators this implies that most permutations of a long sequence can never be generated. Now I wonder what.. can be understood conceptually as generating all possible permutations of the elements of the lists and picking one of these permutations..
Generate permutations of list with repeated elements http://stackoverflow.com/questions/4250125/generate-permutations-of-list-with-repeated-elements permutations of list with repeated elements In Python it is quite simple.. elements In Python it is quite simple to produce all permutations of a list using the itertools module. I have a situation where.. two characters i.e. '1122' . I want to generate all unique permutations. For the string '1122' there are 6 unique permutations 1122..
permutations with unique values http://stackoverflow.com/questions/6284396/permutations-with-unique-values with unique values itertools.permutations generates where.. with unique values itertools.permutations generates where its elements are treated as unique based on.. I want to avoid duplicates like this list itertools.permutations 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Filtering afterwards..
http://stackoverflow.com/questions/6784148/given-a-list-of-elements-in-lexicographical-order-i-e-a-b-c-d-f in lexicographical order i.e. 'a' 'b' 'c' 'd' find the nth permutation Average time to solve I stumbled across this interview question.. in lexicographical order i.e. 'a' 'b' 'c' 'd' find the nth permutation I tried it myself and it took me about ~30 minutes to solve...
Calculating combinations of length k from a list of length n using recursion http://stackoverflow.com/questions/8683092/calculating-combinations-of-length-k-from-a-list-of-length-n-using-recursion sub_lst k sets.append b return sets python recursion permutation share improve this question You can get solution from Generator.. this question You can get solution from Generator for permutations combinations selections of a sequence Python recipe def xuniqueCombinations..
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