Hi.

I have such problem.

I've created py file:

#!/usr/bin/python3

from sympy import *
x = Symbol('x')
print(expand(sin(x)*(x-1)*(x+1)))

When it is inside of SymPy lib dir, it returns correct result in console.
But, when I put it not inside the lib dir, it tells me, that:

NameError: name 'Symbol' is not defined

How can I fix it, to be able to execute this file from anywhere in my 
directory tree?

Thanks
Mike

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