test_ok1/py/rest/testing/setup.py

import py

pydir = py.path.local(py.__file__).dirpath()
mydatadir = py.magic.autopath().dirpath().join("data")

def getdata():
    rel = mydatadir.relto(pydir)
    tmpdir = py.test.ensuretemp(rel.replace(pydir.sep, '_'))
    mydatadir.copy(tmpdir)
    return tmpdir