Refactor __init__ imports and comments in theano and theano.gof sub-packages

theano/__init__.py

@@ -30,7 +30,6 @@ __docformat__ = "restructuredtext en"
 import logging
 import os
 import sys
-import warnings
 
 
 theano_logger = logging.getLogger("theano")
@@ -121,20 +120,11 @@ from theano.misc.safe_asarray import _asarray
 
 from theano.printing import pprint, pp
 
-from theano.scan_module import scan, map, reduce, foldl, foldr, clone, scan_checkpoints
+from theano import tensor
+from theano import scalar
 
 from theano.updates import OrderedUpdates
 
-# scan_module import above initializes tensor and scalar making these imports
-# redundant
-
-# import tensor
-# import scalar
-
-# we don't import by default as we don't want to force having scipy installed.
-
-# import sparse
-
 from theano.gradient import Rop, Lop, grad, subgraph_grad
 
 if (
@@ -228,4 +218,6 @@ def sparse_grad(var):
     return ret
 
 
-__import__("theano.tensor.shared_randomstreams")
+import theano.tensor.shared_randomstreams
+
+from theano.scan_module import scan, map, reduce, foldl, foldr, clone, scan_checkpoints

theano/gof/__init__.py

-"""
-gof.py
-
-gof stands for Graph Optimization Framework.
-
-The gof submodule of theano implements a framework
-for manipulating programs described as graphs. The
-gof module defines basic theano graph concepts:
-    -Apply nodes, which represent the application
-of an Op to Variables. Together these make up a
-graph.
-    -The Type, needed for Variables to make sense.
-    -The FunctionGraph, which defines how a subgraph
-should be interpreted to implement a function.
-    -The Thunk, a callable object that becames part
-of the executable emitted by theano.
-    -Linkers/VMs, the objects that call Thunks in
-sequence in order to execute a theano program.
-
-Conceptually, gof is intended to be sufficiently abstract
-that it could be used to implement a language other than
-theano. ie, theano is a domain-specific language for
-numerical computation, created by implementing
-tensor Variables and Ops that perform mathematical functions.
-A different kind of domain-specific language could be
-made by using gof with different Variables and Ops.
-In practice, gof and the rest of theano are somewhat more
-tightly intertwined.
-
-Currently, gof also contains much of the C compilation
-functionality. Ideally this should be refactored into
-a different submodule.
-
-For more details and discussion, see the theano-dev
-e-mail thread "What is gof?".
-
-"""
+"""Graph optimization framework"""
 
 
 from theano.gof.cc import CLinker, OpWiseCLinker, DualLinker, HideC
@@ -111,4 +75,6 @@ from theano.gof.params_type import ParamsType, Params
 import theano
 
 if theano.config.cmodule.preload_cache:
-    cc.get_module_cache()
+    from theano.gof.cc import get_module_cache
+
+    get_module_cache()