mod, modulo and % under 2.4 and 2.5

Steven D'Aprano steve at REMOVE-THIS-cybersource.com.au
Fri Jan 1 04:06:20 CET 2010


On Fri, 01 Jan 2010 13:48:28 +1100, Ben Finney wrote:

> "W. eWatson" <wolftracks at invalid.com> writes:
> 
>> Steven D'Aprano wrote:
>> > NameError: name 'mod' is not defined
> 
>> So where is it? Here are the choices. import sys, os, glob
>> import string
>> from numpy import *
> 
> If you use ‘from foo import *’ you forfeit any way of saying where a
> name in your code gets bound.

Not quite:

>>> from math import *
>>> sin.__module__
'math'

But this only works with functions and classes, not arbitrary objects:

>>> pi.__module__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'float' object has no attribute '__module__'


> Hence, don't do that.

Avoiding "from module import *" is generally excellent advice. There's 
one or two exceptions, but if you have to ask what they are, you don't 
need to know *wink*



-- 
Steven



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