#### mymodule.py ####

class ExampleClass(object):
    pass

#### example.py ####

# Anything imported using a from statement does not get
# reloaded when the enclosing module is reloaded.
from mymodule import ExampleClass
import mymodule

a = ExampleClass()
b = mymodule.ExampleClass()

print id(ExampleClass)
print id(mymodule.ExampleClass)
print id(a.__class__)
print id(b.__class__)

reload(mymodule)

print '----------'

print id(ExampleClass)
print id(mymodule.ExampleClass), "<----- look!"
print id(a.__class__)
print id(b.__class__)