Attribution error for TensorFlow when running the PPCA example

[PhatBoy44]

When trying to run the PPCA example given, I get errors from TensorFlow.

Running version 1.14, I get:
"AttributeError: module 'tensorflow.python.framework.op_def_registry' has no attribute 'register_op_list'"

If I go to newer versions, it throws the following error:
"'No module named 'tensorflow.contrib'"

Ideas?

[fatma-mahfoudh]

I get the same error when just importing edward. Does anyone know how to fix it? I have tensorflow 2.0