global name 'sqrt' is not defined

[Nick Matzke]

Hi all,

So, I can run this in the ipython shell just fine:

===========
a = ["12", "15", "16", "38.2"]
dim = int(sqrt(size(a)))

dim
 >2
===========


But if I move these commands to a function in another file, it freaks out:


=================================
a = distances_matrix.split('\t')
from LR_run_functions_v2 import make_half_square_array
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
    1549         a = linear_version_of_square_array
-> 1550         dim = int(sqrt(size(a)))
    1551
    1552

NameError: global name 'sqrt' is not defined

=================================




Here's the function in LR_run_functions_v2.py

==========================
def make_half_square_array(linear_version_of_square_array):

	a = linear_version_of_square_array
	dim = int(sqrt(size(a)))
==========================



Any ideas?  If I do something like "import math" in the subfunction, 
then the error changes to "global name 'math' is not defined".

Thanks!
Nick







-- 
====================================================
Nicholas J. Matzke
Ph.D. student, Graduate Student Researcher
Huelsenbeck Lab
Center for Theoretical Evolutionary Genomics
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Department of Integrative Biology
University of California, Berkeley

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-----------------------------------------------------
"[W]hen people thought the earth was flat, they were wrong. When people 
thought the earth was spherical, they were wrong. But if you think that 
thinking the earth is spherical is just as wrong as thinking the earth 
is flat, then your view is wronger than both of them put together."

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14(1), 35-44. Fall 1989.
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====================================================