[Numpy-discussion] min/max not exported in "from numpy import *"
jswhit at fastmail.fm
Thu Jun 29 11:36:09 EDT 2006
Zhang Le wrote:
>> I'm going to take a wild-ass guess and suggest that was a concious decision
>> by the authors. Shadowing builtins is generally a no-no. You just need to
>> be explicit instead of implicit:
>> from numpy import min, max
> I see. But why by default sum is exported? Is that a wise decision?
> In : from numpy import *
> In : help sum
> ------> help(sum)
> Help on function sum in module numpy.core.oldnumeric:
> sum(x, axis=0, dtype=None)
> Zhang Le
Zhang: The reason max and min are not imported by 'from numpy import *'
is because there are no such functions in numpy. They are ndarray
methods now (a.max(), a.min()), there is also a maximum and minium
function which behaves somewhat differently. There is still a sum
function as you have discovered, and it will clobber the builtin.
Another good reason not to use 'from numpy import *'
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/PSD R/PSD1 Email : Jeffrey.S.Whitaker at noaa.gov
325 Broadway Office : Skaggs Research Cntr 1D-124
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
More information about the NumPy-Discussion