tweaks

csst_common/io.py

@@ -73,9 +73,8 @@ def generate_meta(**kwargs) -> fits.Header:
             assert isinstance(
                 kwargs[k], type(meta[k])
             ), f"类型不兼容: kwargs['{k}'] 应为 {type(meta[k]).__name__} 或其子类"
-            meta[k] = kwargs[k]
             # 赋值
-            kwargs[k] = str(kwargs[k])
+            meta[k] = kwargs[k]
         else:
             raise KeyError(f"未知的meta参数: {k}")
     meta_card = fits.Card(