Remove unnessasary load NER task of taskflow (#1135)

Author: wawltor

paddlenlp/taskflow/knowledge_mining.py

@@ -145,6 +145,8 @@ def __init__(self, model, task, **kwargs):
         self._static_mode = False
         self._log_name = self.kwargs[
             'log_name'] if 'log_name' in self.kwargs else 'wordtag'
+        self._linking = self.kwargs[
+            'linking'] if 'linking' in self.kwargs else False
         term_schema_path = download_file(
             self._task_path, "termtree_type.csv", URLS['termtree_type'][0],
             URLS['termtree_type'][1], self._log_name)
@@ -156,9 +158,8 @@ def __init__(self, model, task, **kwargs):
                                  URLS['termtree_tags_pos'][1])
         self._tags_to_index, self._index_to_tags = self._load_labels(tag_path)
 
-        self._termtree = TermTree.from_dir(term_schema_path, term_data_path)
-        self._linking = self.kwargs[
-            'linking'] if 'linking' in self.kwargs else False
+        self._termtree = TermTree.from_dir(term_schema_path, term_data_path,
+                                           self._linking)
         self._construct_tokenizer(model)
         self._usage = usage
         self._summary_num = 2

paddlenlp/taskflow/utils.py

@@ -420,18 +420,19 @@ def find_term(self, term: str, term_type: Optional[str]=None) -> Tuple[
                 else:
                     return False, None
 
-    def build_from_dir(self, term_schema_path, term_data_path):
+    def build_from_dir(self, term_schema_path, term_data_path, linking=True):
         """Build TermTree from a directory which should contain type schema and term data.
 
         Args:
             dir ([type]): [description]
         """
         self.__load_type(term_schema_path)
-        self.__load_file(term_data_path)
-        self.__build_sons()
+        if linking:
+            self.__load_file(term_data_path)
+            self.__build_sons()
 
     @classmethod
-    def from_dir(cls, term_schema_path, term_data_path) -> "TermTree":
+    def from_dir(cls, term_schema_path, term_data_path, linking) -> "TermTree":
         """Build TermTree from a directory which should contain type schema and term data.
 
         Args:
@@ -441,7 +442,7 @@ def from_dir(cls, term_schema_path, term_data_path) -> "TermTree":
             TermTree: [description]
         """
         term_tree = cls()
-        term_tree.build_from_dir(term_schema_path, term_data_path)
+        term_tree.build_from_dir(term_schema_path, term_data_path, linking)
         return term_tree
 
     def __dfs(self,