Python "import" scope

I am dealing with some python code automatically generated for me. I want to avoid manually editing these python files & hence this question/issue:

foo.py:

def foo():
  print "foo"

boo.py:

def boo():
  foo.foo()    # <-- global name 'foo' not defined
  print "boo"

bar.py:

import foo
import boo
def bar():
  boo.boo()
  print "bar"

Execution of:

python.exe bar.py

gives an error that boo did not find foo. But bar is importing both foo & boo. Shouldn't foo be automatically available to boo?

Is there a way to do so? As said boo.py is automatically generated for me & I want to avoid adding import foo to boo.py.

Thanks.