Remove has_key() references from idlelib. IDLE still doesn't run due

to relative import issues.  Any volunteers?

Lib/idlelib/PathBrowser.py

@@ -78,7 +78,7 @@ class DirBrowserTreeItem(TreeItem):
                 normed_name = os.path.normcase(name)
                 if normed_name[i:] == suff:
                     mod_name = name[:i]
-                    if not modules.has_key(mod_name):
+                    if mod_name not in modules:
                         modules[mod_name] = None
                         sorted.append((normed_name, name))
                         allnames.remove(name)