Avoid module being initialized multiple times

paddlehub/module/module.py

@@ -120,9 +120,10 @@ def runable(func):
 
 
 class Module(object):
-    def __new__(cls, name=None, directory=None, module_dir=None, version=None):
-        module = None
 
+    _record = {}
+
+    def __new__(cls, name=None, directory=None, module_dir=None, version=None):
         if cls.__name__ == "Module":
             if name:
                 module = cls.init_with_name(name=name, version=version)
@@ -139,17 +140,18 @@ class Module(object):
                 else:
                     directory = module_dir
                 module = cls.init_with_directory(directory=directory)
-
-        if not module:
-            module = object.__new__(cls)
-        else:
             CacheUpdater(module.name, module.version).start()
+        else:
+            module = object.__new__(cls)
+
         return module
 
     def __init__(self, name=None, directory=None, module_dir=None,
                  version=None):
-        if not directory:
+        # Avoid module being initialized multiple times
+        if not directory or id(self) in Module._record:
             return
+        Module._record[id(self)] = True
 
         mod = self.__class__.__module__ + "." + self.__class__.__name__
         if mod in _module_runable_func: