diff --git a/工具v2/database_tools.py b/工具v2/database_tools.py
index 3a24ccb8..3e9bcc09 100644
--- a/工具v2/database_tools.py
+++ b/工具v2/database_tools.py
@@ -1234,5 +1234,29 @@ def SubstringOccurence(regex,string): #生成regex在string中出现的所有位
     poslist = [item.start() for item in re.finditer(regex,string)]
     return poslist
 
+def select_grade_from_pro_dict(prodict,grades):
+    if len(grades) == 0:
+        return prodict
+    else:
+        gradelist = []
+        for g in grades:
+            if not "届" in g:
+                gradelist.append(g+"届")
+            else:
+                gradelist.append(g)
+        adict = prodict.copy()
+        for id in prodict:
+            raw_usages = prodict[id]["usages"].copy()
+            new_usages = []
+            for u in raw_usages:
+                for g in gradelist:
+                    if g in u:
+                        new_usages.append(u)
+            adict[id]["usages"] = new_usages.copy()
+        return adict
+
+
+
+
 if __name__ == "__main__":
     print("数据库工具, import用.")
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