python - How to call variables from an imported parameter-dependent script? -

i've begun use python scripting language, i'm having difficulty understanding how should call objects file. because i'm not familiar on using attributes , methods.

for example, created simple quadratic formula script.

qf.py

#script solves equation of form a*x^2 + b*x + c = 0 import math def quadratic_formula(a,b,c):     sol1 = (-b - math.sqrt(b**2 - 4*a*c))/(2*a)     sol2 = (-b + math.sqrt(b**2 - 4*a*c))/(2*a)     return sol1, sol2 

so accessing script in python shell or file simple. can script output set if import function , call on it.

>>> import qf >>> qf.quadratic_formula(1,0,-4) (-2.0, 2.0) 

but cannot access variables imported function, e.g. first member of returned set.

>>> print qf.sol1 traceback (most recent call last):  file "<stdin>", line 1, in <module> attributeerror: 'module' object has no attribute 'sol1' 

the same happens if merge namespaces imported file

>>> qf import * >>> quadratic_formula(1,0,-4) (-2.0, 2.0) >>> print sol1 traceback (most recent call last):  file "<stdin>", line 1, in <module> nameerror: name 'sol1' not defined 

is there better way call on these variables imported file? think fact sol1 & sol2 dependent upon given parameters (a,b,c) makes more difficult call them.

i think because sol1 , sol2 local variables defined in function. can

import qf sol1,sol2 = qf.quadratic_formula(1,0,-4) # sol1 = -2.0 # sol2 = 2.0 

but sol1 , sol2 not same variables in qf.py.