Conform to pep8 and pylint :

pep8 version: 2.3.1
./ConfigTreeNode.py:130:49: E231 missing whitespace after ','
./editors/Viewer.py:643:24: E128 continuation line under-indented for visual indent
./editors/Viewer.py:670:12: E221 multiple spaces before operator
./editors/Viewer.py:671:13: E221 multiple spaces before operator
./editors/Viewer.py:2138:52: E203 whitespace before ':'
./editors/Viewer.py:2139:66: W291 trailing whitespace
./controls/VariablePanel.py:154:25: E231 missing whitespace after ','
./controls/LocationCellEditor.py:88:1: W293 blank line contains whitespace
./controls/LocationCellEditor.py:191:25: E221 multiple spaces before operator
./controls/LocationCellEditor.py:200:17: E128 continuation line under-indented for visual indent

pylint 1.8.3,
************* Module controls.LocationCellEditor
controls/LocationCellEditor.py:200: [C0330(bad-continuation), ] Wrong continued indentation (add 9 spaces).
_("Selected location is identical to previous one"))
^ |
************* Module controls.VariablePanel
controls/VariablePanel.py:154: [E1601(print-statement), VariableTable.SetValue] print statement used
************* Module editors.Viewer
editors/Viewer.py:643: [C0330(bad-continuation), ] Wrong continued indentation (add 1 space).
self.GetAddMenuCallBack(self.AddNewComment))
^|
editors/Viewer.py:598: [W0612(unused-variable), Viewer.AddDivergenceMenuItems] Unused variable 'add_branch'
editors/Viewer.py:1655: [E0602(undefined-variable), Viewer.PopupConnectionMenu] Undefined variable 'variable_type'
editors/Viewer.py:1649: [W0612(unused-variable), Viewer.PopupConnectionMenu] Unused variable 'connection_type'
************* Module connectors.PYRO.PSK_Adapter

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# This file is part of Beremiz
#
# Copyright (C) 2007: Laurent BESSARD
# Copyright (C) 2007-2018: Edouard TISSERANT
#
# See COPYING file for copyrights details.

libraries = [
    ('Native', 'NativeLib.NativeLibrary', True),
    ('Python', 'py_ext.PythonLibrary', True),
    ('Etherlab', 'etherlab.EthercatMaster.EtherlabLibrary', False),
    ('SVGUI', 'svgui.SVGUILibrary', False)]

catalog = [
    ('canfestival', _('CANopen support'), _('Map located variables over CANopen'), 'canfestival.canfestival.RootClass'),
    ('bacnet', _('Bacnet support'), _('Map located variables over Bacnet'), 'bacnet.bacnet.RootClass'),
    ('etherlab', _('EtherCAT master'), _('Map located variables over EtherCAT'), 'etherlab.etherlab.RootClass'),
    ('modbus', _('Modbus support'), _('Map located variables over Modbus'), 'modbus.modbus.RootClass'),
    ('c_ext', _('C extension'), _('Add C code accessing located variables synchronously'), 'c_ext.CFile'),
    ('py_ext', _('Python file'), _('Add Python code executed asynchronously'), 'py_ext.PythonFile'),
    ('wxglade_hmi', _('WxGlade GUI'), _('Add a simple WxGlade based GUI.'), 'wxglade_hmi.WxGladeHMI'),
    ('svgui', _('SVGUI'), _('Experimental web based HMI'), 'svgui.SVGUI')]

file_editors = []