def a(): print("I am from function a") x = 10 a() # case 1 : import lib as shortname #import dio as d #d.a() #import tria as t #t.a() #print(x + d.x + t.x + d._x) # case 2 from lib import * #from dio import * #a() #from tria import * #a() # case 3 from lib import selected items from dio import * from dio import _x a() print(x, _x)