Re: global name 'sqrt' is not defined

OK, so the problem was that I had to exit ipython, re-enter it, and then import my module to get the errors to disappear. Thanks for the help!

(PS: Is there a way to force a complete reload of a module, without exiting ipython? Just doing the import command again doesn't seem to do it.)

Thanks!
Nick


Diez B. Roggisch wrote:
Nick Matzke schrieb:


Scott David Daniels wrote:
M.-A. Lemburg wrote:
On 2009-02-05 10:08, Nick Matzke wrote:
..., I can run this in the ipython shell just fine:
a = ["12", "15", "16", "38.2"]
dim = int(sqrt(size(a)))
...But if I move these commands to a function in another file, it freaks out:
You need to add:

from math import sqrt
or:
from cmath import sqrt
or:
from numpy import sqrt





The weird thing is, when I do this, I still get the error:

============
nick@mws2[phylocom]|27> a = ["12", "15", "16", "38.2"]
nick@mws2[phylocom]|28> from LR_run_functions_v2 import make_half_square_array
nick@mws2[phylocom]|24> d = make_half_square_array(a)
---------------------------------------------------------------------------

NameError Traceback (most recent call last)

/bioinformatics/phylocom/<ipython console> in <module>()

/bioinformatics/phylocom/_scripts/LR_run_functions_v2.py in make_half_square_array(linear_version_of_square_array)
1548 from numpy import sqrt
1549 a = linear_version_of_square_array
-> 1550 dim = int(sqrt(size(a)))
1551
1552

NameError: global name 'sqrt' is not defined
nick@mws2[phylocom]|25>
============

Is there some other place I should put the import command? I.e.:
1. In the main script/ipython command line

2. In the called function, i.e. make_half_square_array() in LR_run_functions_v2.py

3. At the top of LR_run_functions_v2.py, outside of the individual functions?

The latter. Python's imports are always local to the module/file they are in, not globally effective.


Diez
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--
====================================================
Nicholas J. Matzke
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Huelsenbeck Lab
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