[Numpy-discussion] Args for rand and randn, and workarounds

Travis Oliphant oliphant.travis at ieee.org
Wed Jul 12 01:52:57 CDT 2006


Bill Baxter wrote:
>
>     And mark my words, if we make rand() polymorphic,
>
>     we will get just as many newbies coming to the list asking why
>     ones(3, 4)
>
>     doesn't work.
>
>
> I think you're probably right there, at least for Matlab converts.  
> Matlab allows either way of calling for all of rand, ones, zeros, eye, 
> and in general tries to make *every* function accept *any* possible 
> combination of arguments that might make sense.  So having rand() 
> accept both, but not the others, will undoubtedly be unexpected to 
> Matlab users.  And the argument against funky overloading will be 
> weaker since they'll be able to say "well rand() does it? why can't 
> ones()?"
>
> Fortunately it's pretty easy to define one's own custom versions of 
> these little helper functions to make them just the way you like 
> them.   Or for rand(), just "from numpy.random import uniform_sample 
> as rand" if that's the version you like.

Because of this.  I've removed the global_namespace functions (fft, 
ifft, rand, and randn) from numpy.  They are *no longer* in the 
top-level name-space.   If you want them, setup a startup-file 
appropriately.


-Travis





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