A simpler more pythonic approach to adding in

Hi all,

I need a cleaner ( and shorter ) way to to look in my home directory or
any directory for a directory called modules. This is what I currently
have - but it is really ugly. Some a few of you experts point me to a
cleaner more pythonic approach?

mod = 0
if os.path.exists( os.environ['HOME'] + "/modules"):
sys.path.insert( 0, os.environ['HOME'] + "/modules")
mod =1
else:
path = os.environ['PWD']
while path != "/":
if os.path.exists( path + "/modules"):
sys.path.insert( 0, path + "/modules")
mod= 1
path = "/"
else:
path = os.path.split(path)[0]

if mod:
from foo import foo

.

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