Is there any way to access Protocol Buffers with python 3.x?

Here is the newer fork of most recent version of protobuf (2.5.0 + arm64 patches) at the moment that supports Python 3 and still backward compatible with Python 2.4: https://github.com/GreatFruitOmsk/protobuf-py3

UPDATE 2: Python 3.x is natively supported as of version 3.0.0.

You can see versions released on GitHub here: https://github.com/protocolbuffers/protobuf/releases

UPDATE: The stable version of protobuf, 2.6.1, does not support Python 3.x. However, the newer 3.0.0 release (still in beta) supports Python 3.x. You can see versions released on PyPi here: https://pypi.python.org/pypi/protobuf

No, there isn't. There is a discussion on the protobuf google group about Python 3.X support. It indicates that Google wants to keep support for Python 2.4, so porting to Python 3.X is not easy. If the project branches or can drop support for Python 2.4 and 2.5, it would be a lot easier to port.