from sys import path
def f(v):
from os.path import join# duplicate import
v.append(join(foo))# join from os.path
v.append(__all__)# __all__ is unknown
x = 7
if x == 100:
from xYzZy import *# not found
x=z
not_used = 13
import getopt # duplicate import
from string import *# shadow 'join'