Fixing minor bug with the logging level in ipapp.py.

IPython/core/application.py

@@ -153,7 +153,6 b' class Application(object):'
             self.log_level = self.command_line_config.Global.log_level
         except AttributeError:
             pass # Use existing value which is set in Application.init_logger.
-
         self.log.debug("Command line config loaded:")
         self.log.debug(repr(self.command_line_config))
 
@@ -236,7 +235,10 b' class Application(object):'
         else:
             self.log.debug("Config file loaded: <%s>" % loader.full_filename)
             self.log.debug(repr(self.file_config))
-        # We need to keeep self.log_level updated.
+        # We need to keeep self.log_level updated.  But we only use the value
+        # of the file_config if a value was not specified at the command
+        # line.
+        if not hasattr(self.command_line_config.Global, 'log_level'):
         try:
             self.log_level = self.file_config.Global.log_level
         except AttributeError:

IPython/core/ipapp.py

@@ -413,6 +413,7 b' class IPythonApp(Application):'
         # Make sure there is a space below the banner.
         if self.log_level <= logging.INFO: print
 
+        # Now a variety of things that happen after the banner is printed.
         self._enable_gui()
         self._load_extensions()
         self._run_exec_lines()