On 1/31/12 3:08 PM, gujax wrote:
Hi,
I am confused on this quite bad!!
If I have this typed in interactive python:
import numpy
def dummy():
y=numpy.arange(1,2,0.1)
return y
and then
s = dummy()
s
array[1. , 1.1, 1.2........]
it works.
But if I have a module called example.py, whose code is
def dummy():
y=numpy.arange(1,2,0.1)
return y
and now if I do the following:
import numpy
>from example import *
s=dummy()
The above sequence does not work. It gives an error saying global
variable numpy not defined.
I understand that when I import a module it gets imported after
getting compiled and therefore, the module should
have a statement "import numpy" at its start.
But what if I just want to use the function 'dummy'?
You need to import numpy in dummy.py. When a function needs to look up a name,
it goes to the module's namespace in which the function is defined, not one of
the many namespaces where the function is called from.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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