Hi, The number was high but it was only a sort of test.now I learned how it works,
thanks Gb On Sep 20, 2016 12:48 PM, "Matt Ruffalo" <matt.ruff...@gmail.com> wrote: > Hello- > > On 2016-09-20 11:48, Gabriele Brambilla wrote: > > does it mean that my number of points is too high? > > In short, yes. From your usage of the 'print' statement, you are running > the code under Python 2.x. In this version of Python, the 'range' > function creates a full list of numbers, and so you are asking 'range' > to create a list of 33.8 billion integers. Python lists are essentially > implemented in C as dense arrays of pointers to PyObject structs, so in > addition to the actual numeric values, you will need eight bytes per > value in the list (assuming a 64-bit OS and Python build). This is > already 270GB of memory just for these pointers, in addition to the > actual numeric values, which might take up to an additional 135GB (if > each numeric value is stored as a 32-bit integer). Are you running this > on a machine with ≥405GB memory? > > To solve your immediate problem, you could replace 'range' with 'xrange' > in your code, but this will probably only allow you to encounter another > problem: this loop will take a *very* long time to run, even without > doing any numerical work inside it. Unfortunately, there's no way to > suggest any algorithm/numerical analysis improvements without more > information about what you're trying to accomplish. > > MMR... > _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
