run all scripts in sub-directory as subroutines?

[guthrie]

I want to have a program which will form a list of all *.py scripts in
a sub-directory, and then call some standard messages on them. So I
can add a new data source modularly by just dropping a new file into
the sources directory with the appropriate methods in it.

For example:

path = sys.path[0]
print "Starting Directory:: " + path

getDir=path + "\Sources"            # point to directory of data
sources
for name in os.listdir(getDir):     # run collection from each source
    src = imp.load_source("data",getDir,open(getDir+"\\"+name, 'rb'))
    src.getData()
    src.doGraph()

This works fine, but in the sub-modules the sys.path appropriately
returns the same as from the parent, I want them to know their own
file names. How?? I can pass it to them, but wondered if there is a
more self-sufficient way for a module to know from where it was
invoked.