1 import sys

     2 

     3 class Std(object):

     4     """ makes top-level python modules available as an attribute,

     5         importing them on first access.

     6     """

     7 

     8     def __init__(self):

     9         self.__dict__ = sys.modules

    10 

    11     def __getattr__(self, name):

    12         try:

    13             m = __import__(name)

    14         except ImportError:

    15             raise AttributeError("py.std: could not import %s" % name)

    16         return m

    17 

    18 std = Std()