python main.py errors.

[jiapei100]

python main.py brings me the following error.... Any suggestions?

...../fomoro-theano$ python main.py 
Traceback (most recent call last):
  File "main.py", line 8, in <module>
    import theano
  File "/usr/local/lib/python3.5/dist-packages/Theano-0.8.0-py3.5.egg/theano/__init__.py", line 64, in <module>
    from theano.compile import (
  File "/usr/local/lib/python3.5/dist-packages/Theano-0.8.0-py3.5.egg/theano/compile/__init__.py", line 10, in <module>
    from theano.compile.function_module import *
  File "/usr/local/lib/python3.5/dist-packages/Theano-0.8.0-py3.5.egg/theano/compile/function_module.py", line 22, in <module>
    import theano.compile.mode
  File "/usr/local/lib/python3.5/dist-packages/Theano-0.8.0-py3.5.egg/theano/compile/mode.py", line 77, in <module>
    OPT_NONE = gof.Query(include=[], exclude=exclude)
  File "/usr/local/lib/python3.5/dist-packages/Theano-0.8.0-py3.5.egg/theano/gof/optdb.py", line 173, in __init__
    self.include = OrderedSet(include)
  File "/usr/local/lib/python3.5/dist-packages/Theano-0.8.0-py3.5.egg/theano/misc/ordered_set.py", line 91, in __init__
    root.prev = root.__next__ = weakref.ref(root)
AttributeError: 'Link' object has no attribute '__next__'