[Python] format

src/dynamic_graph/__init__.py

@@ -5,9 +5,6 @@ Author: Florent Lamiraux
 
 from __future__ import print_function
 
-import sys
-
 from . import entity  # noqa
 from . import signal_base  # noqa
-
 from .wrap import *  # noqa

src/dynamic_graph/entity.py

@@ -5,5 +5,5 @@
 from __future__ import print_function
 
 # for backward compat
-from .wrap import LoggerVerbosity as VerbosityLevel
-from .wrap import Entity
+from .wrap import LoggerVerbosity as VerbosityLevel  # noqa
+from .wrap import Entity  # noqa

src/dynamic_graph/signal_base.py

@@ -4,12 +4,14 @@
 
 from __future__ import print_function
 
-from .wrap import SignalBase, create_signal_wrapper as SignalWrapper
-
 # I kept what follows for backward compatibility but I think it should be
 # removed
 import re
 
+from .wrap import SignalBase  # noqa
+from .wrap import create_signal_wrapper as SignalWrapper  # noqa
+
+
 def stringToTuple(vector):
     """
     Transform a string of format '[n](x_1,x_2,...,x_n)' into a tuple of numbers.