execfile then import back

[overly.crazy.steve at gmail.com]

> ########## x.py and y.py (they are identical) ##########
> import testexec
> print "1:", v, testexec.v
> testexec.v = 7

Oops, testexec should be changed to t instead. That is:

########## x.py and y.py (they are identical) ##########
import t
print "1:", v, t.v
t.v = 7