today, I checked how sys.path got implemented by python. i found it points to sys.pi file(python 2.7.8 in windows). see code
argv = []
__stdout__ = file(__file__)
__name__ = 'sysoverride'
__stderr__ = file(__file__)
dllhandle = 0
exitfunc = None
stdin = file(__file__)
modules = {}
last_type = None
stderr = file(__file__)
path = []
last_value = None
hexversion = 17105408
my question is how python can print out a list of python paths with path=[] statement. it is really confused me. Thanks