From 24cbccb6a6a341217fc7d08ecd3785557ed8ddfc Mon Sep 17 00:00:00 2001
From: reiche <sven.reiche@psi.ch>
Date: Thu, 27 Jun 2024 14:49:05 +0200
Subject: [PATCH] Added routines to get only the PVs from snapshot file and to
 get the data by these PVS. This avoids crashed of too many files open when
 used often

---
 interface/__init__.py |  2 ++
 interface/snap.py     | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/interface/__init__.py b/interface/__init__.py
index 397be37..4621928 100644
--- a/interface/__init__.py
+++ b/interface/__init__.py
@@ -1,4 +1,6 @@
 from .snap import getSnap
+from .snap import getSnapPV
+from .snap import getSnapVal
 from .snap import saveSnap
 from .snap import loadSnap
 from .snap import parseSnapShotReqYAML
diff --git a/interface/snap.py b/interface/snap.py
index 5cc0063..5842b73 100644
--- a/interface/snap.py
+++ b/interface/snap.py
@@ -61,6 +61,24 @@ def getSnap(pvs=None):
             ret[pv]=float(val[i]) 
     return ret
 
+def getSnapPV(pvs=None):
+    if not isinstance(pvs,list):
+        pvs = parseSnapShotReqYAML(pvs)
+    if not pvs:
+        return
+    return [epics.PV(pvname,auto_monitor = False) for pvname in pvs]
+
+
+def getSnapVal(pvs=None):
+    if not pvs:
+        return None
+    ret={}
+    val = [pv.value for pv in pvs]
+    for i,pv in enumerate(pvs):
+        if not val[i] is None:      # filter out None values
+            ret[pv.pvname]=float(val[i]) 
+    return ret
+
 def saveSnap(pvs={},label="", comment = "generated by application",reqfile = "SF_settings.yaml"):
     filename = datetime.datetime.now().strftime('/sf/data/applications/snapshot/SF_settings_%Y%m%d_%H%M%S.snap')
     with open(filename,'w') as fid: