Work around Python 3.6 import bug

theano/tensor/blas_c.py

-import theano.tensor.basic as tt
+# import theano.tensor.basic as tt
 
 from theano import config
 from theano.gof.params_type import ParamsType
 from theano.scalar import bool as bool_t
+
+# Work-around for Python 3.6 issue that prevents `import theano.tensor as tt`
+from theano.tensor import basic as tt
+
 from theano.tensor.opt import in2out
 from theano.tensor.blas import ldflags, blas_header_text, blas_header_version
 from theano.tensor.blas import blas_optdb, optdb, local_optimizer

theano/tensor/nnet/bn.py

 import numpy as np
 
 import theano
-import theano.tensor.basic as tt
+
+# import theano.tensor.basic as tt
 
 from theano import Apply, Op
 from theano.gof import local_optimizer
 from theano.gof.opt import copy_stack_trace
 from theano.scalar import Composite, add, as_common_dtype, mul, sub, true_div
+
+# Work-around for Python 3.6 issue that prevents `import theano.tensor as tt`
+from theano.tensor import basic as tt
 from theano.tensor import TensorType, as_tensor_variable
 from theano.tensor.elemwise import Elemwise
 from theano.tensor.opt import register_specialize_device

theano/tensor/nnet/nnet.py

@@ -18,12 +18,16 @@ import warnings
 
 import numpy as np
 import theano
-import theano.tensor.basic as tt
+
+# import theano.tensor.basic as tt
 
 from theano import scalar
 from theano.compile import optdb
 from theano.gof.graph import Apply
 from theano.gof.op import Op
+
+# Work-around for Python 3.6 issue that prevents `import theano.tensor as tt`
+from theano.tensor import basic as tt
 from theano.tensor.opt import (
     register_specialize,
     register_stabilize,

theano/tensor/opt.py

@@ -14,7 +14,8 @@ import numpy as np
 
 import theano
 import theano.scalar.basic as ts
-import theano.tensor.basic as tt
+
+# import theano.tensor.basic as tt
 
 from functools import reduce
 from collections import defaultdict
@@ -26,6 +27,10 @@ from theano import (
     config,
     compile,
 )  # to register the optimizer built by this file
+
+# Work-around for Python 3.6 issue that prevents `import theano.tensor as tt`
+from theano.tensor import basic as tt
+
 from theano.gof import (
     opt,
     InconsistencyError,