add @Property to VmcheckerPaths

bin/misc.py

@@ -68,61 +68,71 @@ def db_file():
         return None
 
 
-class VmcheckerPaths:
+class VmcheckerPaths(object):
     """ All paths related to vmchecker. """
     def __init__(self):
         pass
 
     def abs_path(self, relative):
         return os.path.join(self.root(), relative)
 
+    @property
     def root(self):
         assert 'VMCHECKER_ROOT' in os.environ, (
             'VMCHECKER_ROOT environment variable not defined')
         return os.path.abspath(os.environ['VMCHECKER_ROOT'])
 
+    @property
     def tester_paths(self):
         """ A list of all the paths relevant to the tester machine."""
         return [self.dir_queue()]
 
+    @property
     def storer_paths(self):
         """ A list of all the paths relevant to the storer machine."""
         return [self.dir_unchecked(), self.dir_checked(),
                 self.dir_backup(), self.dir_tests()]
 
+    @property
     def dir_unchecked(self):
         """ The absolute path of the unchecked homeworks
         are kept.
         This path is valid on the storer machine."""
         return self.abs_path("unchecked")
 
+    @property
     def dir_checked(self):
         """ The absolute path of the checked homeworks
         are kept.
         This path is valid on the storer machine."""
         return self.abs_path("checked")
 
+    @property
     def dir_tests(self):
         """ The absolute path of the test archives for the
         homeworks are kept.
         This path is valid on the storer machine."""
         return self.abs_path("tests")
 
+    @property
     def dir_queue(self):
         """ The absolute path of the task queue directory.
         This path is valid on the tester machine."""
         return self.abs_path("queue")
 
+    @property
     def dir_backup(self):
         """ The absolute path of the directory where backups
         of tasks are kept.
         This path is valid on the storer machine."""
         return self.abs_path("back")
 
+    @property
     def db_file(self):
         """ The absolute path of the database file """
         return self.abs_path("vmchecker.db")
 
+    @property
     def config_file(self):
         """Returns absolute path for config file 'VMCHECKER_INI'"""
         VMCHECKER_INI = 'vmchecker.ini'