clean-up imports and docs

docs/modules/RL.rst

-tensorpack.RL package
-=====================
-
-.. automodule:: tensorpack.RL
-    :members:
-    :undoc-members:
-    :show-inheritance:

docs/modules/index.rst

@@ -12,5 +12,4 @@ API Documentation
   predict
   tfutils
   utils
-  RL
 

docs/modules/tfutils.rst

 tensorpack.tfutils package
 ==========================
 
+Module contents
+---------------
+
+.. automodule:: tensorpack.tfutils
+    :members:
+    :undoc-members:
+    :show-inheritance:
+
 tensorpack.tfutils.collection module
 ------------------------------------
 
@@ -88,12 +96,3 @@ tensorpack.tfutils.varreplace module
     :members:
     :undoc-members:
     :show-inheritance:
-
-
-Module contents
----------------
-
-.. automodule:: tensorpack.tfutils
-    :members:
-    :undoc-members:
-    :show-inheritance:

examples/A3C-Gym/simulator.py

@@ -15,7 +15,6 @@ import six
 from six.moves import queue
 import zmq
 
-from tensorpack.models.common import disable_layer_logging
 from tensorpack.callbacks import Callback
 from tensorpack.tfutils.varmanip import SessionUpdate
 from tensorpack.predict import OfflinePredictor

examples/Char-RNN/char-rnn.py

@@ -13,6 +13,7 @@ import six
 from six.moves import map, range
 
 from tensorpack import *
+from tensorpack.tfutils import symbolic_functions, summary, optimizer
 from tensorpack.tfutils.gradproc import GlobalNormClip
 from tensorpack.utils.globvars import globalns as param
 

tensorpack/models/common.py

@@ -17,7 +17,7 @@ from ..utils.develop import building_rtfd
 _LAYER_LOGGED = set()
 _LAYER_REGISTERED = {}
 
-__all__ = ['layer_register', 'disable_layer_logging', 'get_registered_layer', 'VariableHolder']
+__all__ = ['layer_register', 'VariableHolder']
 
 
 class VariableHolder(object):

tensorpack/tfutils/__init__.py

@@ -34,4 +34,4 @@ for _, module_name, _ in iter_modules(
     if module_name in _TO_IMPORT:
         _global_import(module_name)  # import the content to tfutils.*
 __all__.extend(['sessinit', 'summary', 'optimizer',
-                'sesscreate', 'gradproc', 'varreplace'])
+                'sesscreate', 'gradproc', 'varreplace', 'symbolic_functions'])

tensorpack/utils/viz.py

@@ -161,7 +161,7 @@ def stack_patches(
     """
     Stacked patches into grid, to produce visualizations like the following:
 
-    .. image:: https://github.com/ppwwyyxx/tensorpack/raw/master/examples/GAN/demo/CelebA-samples.jpg
+    .. image:: https://github.com/ppwwyyxx/tensorpack/raw/master/examples/GAN/demo/BEGAN-CelebA-samples.jpg
 
     Args:
         patch_list(list[ndarray] or ndarray): NHW or NHWC images in [0,255].