refactor: set default meta values to None (null)

csst_common/io.py

@@ -28,39 +28,39 @@ from .time import now
 # meta字段和默认值
 REQUIRED_KEYS_IN_META = dict(
     # 编排信息
-    dataset="null",
-    instrument="null",
-    obs_type="null",
-    obs_group="null",
-    obs_id="null",
+    dataset=None,
+    instrument=None,
+    obs_type=None,
+    obs_group=None,
+    obs_id=None,
     # 探测信息
-    detector="null",
-    filter="null",
+    detector=None,
+    filter=None,
     # 参考信息
-    pmapname="null",
-    ref_cat="null",
+    pmapname=None,
+    ref_cat=None,
     # 数据处理信息
-    custom_id="null",
-    batch_id="null",
-    dag_group="null",
-    dag_group_run="null",
-    dag="null",
-    dag_run="null",
+    custom_id=None,
+    batch_id=None,
+    dag_group=None,
+    dag_group_run=None,
+    dag=None,
+    dag_run=None,
     priority=-1,
     data_list=[],
     extra_kwargs={},
     created_time="1970-01-01T00:00:00.000",
     rerun=-1,
     # 数据产品信息
-    data_model="null",  # 数据产品类型，手动设置
-    data_uuid="null",  # UUID，自动设置
+    data_model=None,  # 数据产品类型，手动设置
+    data_uuid=None,  # UUID，自动设置
     qc_status=-1024,  # QC状态
     # Docker镜像名称和版本
-    docker_image="null",  # 镜像名称，自动设置
-    build="null",  # 镜像版本，自动设置
+    docker_image=None,  # 镜像名称，自动设置
+    build=None,  # 镜像版本，自动设置
     # 额外的观测筛选参数
-    object="null",  # 观测目标
-    proposal_id="null",  # 观测申请ID
+    object=None,  # 观测目标
+    proposal_id=None,  # 观测申请ID
     ra=-3.141592653589793,  # 赤经
     dec=-3.141592653589793,  # 赤纬
     healpix=-1,  # HEALPix，每种数据产品的nside可以不一样
@@ -97,8 +97,8 @@ def generate_meta(**kwargs) -> dict:
         else:
             raise KeyError(f"未知的meta参数: {k}")
     # automatically set docker_image, build, and created_date
-    meta["docker_image"] = os.getenv("PIPELINE_ID", default="null")
-    meta["build"] = os.getenv("BUILD", default="null")
+    meta["docker_image"] = os.getenv("PIPELINE_ID", default=None)
+    meta["build"] = os.getenv("BUILD", default=None)
     meta["prc_date"] = now()
     meta["data_uuid"] = str(uuid.uuid4())
     return meta
@@ -327,7 +327,7 @@ def delete_section(
 
 
 def get_proc_info(**kwargs):
-    cards = [("BUILD", os.getenv("BUILD", default="null"), "")]
+    cards = [("BUILD", os.getenv("BUILD", default=""), "")]
     for k, v in kwargs.items():
         cards.append((k, v, ""))
     header = fits.Header(cards=cards)