进行了优化，减少了上帝结构体的符号表占用

lib/core/Handles/HandlesAnnAssign.py

@@ -80,7 +80,7 @@ class AnnAssignHandle(BaseHandle):
                             ClassName = CN
                             break
             IsUnion = False
-            if ClassName and ClassName in self.Trans.SymbolTable:
+            if ClassName and self.Trans.SymbolTable.has(ClassName):
                 TypeInfo = self.Trans.SymbolTable[ClassName]
                 if TypeInfo.IsUnion:
                     IsUnion = True
@@ -161,7 +161,7 @@ class AnnAssignHandle(BaseHandle):
                     info = CTypeInfo()
                     info.IsDefine = True
                     info.DefineValue = Node.value.value
-                    self.Trans.SymbolTable[VarName] = info
+                    self.Trans.SymbolTable.insert(VarName, info)
                     Gen._record_var_signedness(VarName, TypeInfo.IsUInt)
                 return
             if TypeInfo.IsStr or (isinstance(Node.annotation, ast.Name) and Node.annotation.id == 'str'):