Hi, 

I wanted to write a Sage third-party module to generate random numbers. The 
module contains a class which includes a method to generate a random number. 
The method calls on the ntl library:

r = ntl.ZZ_random(2**512)

However, after I installed the module in Sage via:

sage --python GenRan.py install

and typed

sage: from GenRan import *
sage: genran = GenRan()
sage: genran()

I get the error message:
NameError: global name 'ntl' is not defined.

But when I attach GenRan directly via:

sage: attach GenRanNum.py
sage: genran = GenRan()
sage: genran()
1928749784019341983249823749823423948723984

I get the random number I desire. 

Why is this so? I am using sage version 5.7 on Linux version 2.6. Would greatly 
appreciate any help. Thanks!




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