Fix logging support for Python 2.6

Use logutils when running on Python 2.6.

Close #512.

glances/core/glances_logging.py

@@ -20,7 +20,12 @@
 """Custom logging class"""
 
 import logging
-import logging.config
+try:
+    # Python 2.6
+    from logutils.dictconfig import dictConfig
+except ImportError:
+    # Python >= 2.7
+    from logging.config import dictConfig
 import os
 import tempfile
 
@@ -86,15 +91,9 @@ def glances_logger():
     """Build and return the logger"""
     temp_path = tempfile_name()
     _logger = logging.getLogger()
-    try:
-        LOGGING_CFG['handlers']['file']['filename'] = temp_path
-        logging.config.dictConfig(LOGGING_CFG)
-    except AttributeError:
-        # dictConfig is only available for Python 2.7 or higher
-        # Minimal configuration for Python 2.6
-        logging.basicConfig(filename=temp_path,
-                            level=logging.DEBUG,
-                            format='%(asctime)s -- %(levelname)s -- %(message)s')
+    LOGGING_CFG['handlers']['file']['filename'] = temp_path
+    dictConfig(LOGGING_CFG)
+
     return _logger
 
 logger = glances_logger()

setup.py

@@ -31,7 +31,6 @@ def get_data_files():
         conf_path = os.path.join(os.environ.get('APPDATA'), 'glances')
     else:  # Unix-like + per-user install
         conf_path = os.path.join('etc', 'glances')
-
     data_files.append((conf_path, ['conf/glances.conf']))
 
     for mo in glob.glob('i18n/*/LC_MESSAGES/*.mo'):
@@ -45,8 +44,8 @@ def get_requires():
     requires = ['psutil>=2.0.0']
     if sys.platform.startswith('win'):
         requires += ['colorconsole']
-    if sys.version_info < (2, 7):
-        requires += ['argparse']
+    if sys.version_info == (2, 6):
+        requires += ['argparse', 'logutils']
 
     return requires