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python Programming Glossary: reduceUsing numpy to build an array of all combinations of two arrays http://stackoverflow.com/questions/1208118/using-numpy-to-build-an-array-of-all-combinations-of-two-arrays for i in a for j in b c.append r_ i j return c The I used reduce to apply that to m copies of the same array def combs a m return.. that to m copies of the same array def combs a m return reduce comb a m And then I evaluate my function like this values combs..
What is the best way to get all the divisors of a number? http://stackoverflow.com/questions/171765/what-is-the-best-way-to-get-all-the-divisors-of-a-number n nfactors len factors f 0 nfactors while True yield reduce lambda x y x y factors x 0 f x for x in range nfactors 1 i 0..
Why program functionally in Python? http://stackoverflow.com/questions/1892324/why-program-functionally-in-python And their code now contains lots more lambdas maps and reduces. I understand that functional languages are good for concurrency.. lambda even more so map and filter and most especially reduce are hardly ever the right tool for the job in Python which is.. way Fortran in a Fortesque way and so on . Moving on to reduce one comment claims that reduce is the best way to compute the..
http://stackoverflow.com/questions/280243/python-linked-list cons lambda el lst el lst mklist lambda args reduce lambda lst el cons el lst reversed args None car lambda lst..
Inverse Distance Weighted (IDW) Interpolation with Python http://stackoverflow.com/questions/3104781/inverse-distance-weighted-idw-interpolation-with-python is you are tied to the cell size you are using. If you reduce the cell size to get better accuracy processing takes a long..
Flattening a shallow list in Python http://stackoverflow.com/questions/406121/flattening-a-shallow-list-in-python around on Stack Overflow I got the desired results with a reduce statement reduce list.__add__ map lambda x list x mi.image_set.all.. Overflow I got the desired results with a reduce statement reduce list.__add__ map lambda x list x mi.image_set.all for mi in.. call there because x is a Django QuerySet object. But the reduce method is fairly unreadable. So my question is Is there a simple..
What is the most efficient way of finding all the factors of a number in Python? http://stackoverflow.com/questions/6800193/what-is-the-most-efficient-way-of-finding-all-the-factors-of-a-number-in-python share improve this question def factors n return set reduce list.__add__ i n i for i in range 1 int n 0.5 1 if n i 0 This.. matching factors. You can then use x fac1 to get fac2 the reduce list.__add__ ... is taking the little lists of fac1 fac2 and..
Making a flat list out of list of lists in Python [duplicate] http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python but maybe there is some cool one liner I tried it with reduce but I get an error. Code l 1 2 3 4 5 6 7 8 9 reduce lambda x.. with reduce but I get an error. Code l 1 2 3 4 5 6 7 8 9 reduce lambda x y x.extend y l Error message Traceback most recent.. usec per loop python mtimeit s'l 1 2 3 4 5 6 7 8 9 99' 'reduce lambda x y x y l ' 1000 loops best of 3 1.1 msec per loop Explanation..
KenKen puzzle addends: REDUX A (corrected) non-recursive algorithm http://stackoverflow.com/questions/1061590/kenken-puzzle-addends-redux-a-corrected-non-recursive-algorithm like # 6 3 2 1 and 6 2 3 1 which is pointless. # Reduce the target_sum with x to keep the sum correct. # Reduce the.. # Reduce the target_sum with x to keep the sum correct. # Reduce the number of cells with 1. for combo in make_combos x target_sum..
MapReduce results seem limited to 100? http://stackoverflow.com/questions/13318791/mapreduce-results-seem-limited-to-100 results seem limited to 100 I'm playing around with Map Reduce.. results seem limited to 100 I'm playing around with Map Reduce in MongoDB and python and I've run into a strange limitation...
Reduce left and right margins in matplotlib plot http://stackoverflow.com/questions/4042192/reduce-left-and-right-margins-in-matplotlib-plot left and right margins in matplotlib plot I'm struggling to..
Hadoop Streaming: Mapper 'wrapping' a binary executable http://stackoverflow.com/questions/4113798/hadoop-streaming-mapper-wrapping-a-binary-executable but it hasn't been answered yet... Hadoop Elastic Map Reduce with binary executable python binary streaming hadoop mapreduce..
How to get started with Big Data Analysis http://stackoverflow.com/questions/4322559/how-to-get-started-with-big-data-analysis with Big Data crunching. How to start simple with Map Reduce and the use of Hadoop How can I leverage my skills in R and..
Merging a list of time-range tuples that have overlapping time-ranges http://stackoverflow.com/questions/5679638/merging-a-list-of-time-range-tuples-that-have-overlapping-time-ranges iterate over the results use yield to generate the values. Reduce construction of intermediate objects for example move the tuple..
Simple counter example using mapreduce in Google App Engine http://stackoverflow.com/questions/6060095/simple-counter-example-using-mapreduce-in-google-app-engine it's written It is now possible to run full Map Reduce jobs on App Engine . I wonder if I can use mapreduce in this..
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