Python API Functions equivalent to ruby's rb_big2str() and rb_str2cstr()

[rahul]

Is functions equivalent to ruby's  rb_big2str() and rb_str2cstr()
available in Python.
I had search a lot in google but not able to find that.
If anybody know than please give me the name of those functions of
Python.
-- 
http://mail.python.org/mailman/listinfo/python-list