added script that downloads camera background from the pipelines into hdf5

cambkg.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python
+
+import base64
+import numpy as np
+import h5py
+from datetime import datetime, timedelta
+from cam_server_client import PipelineClient
+
+
+start = datetime.now() - timedelta(days=10)
+cam = "SATES21-CAMS-PATT1"
+
+
+pc = PipelineClient("http://sf-daqsync-01:8889")
+
+bkg_names = pc.get_backgrounds(cam)
+bkg_names.sort()
+
+#fmt = "20221209_220537_978799"
+fmt = "%Y%m%d_%H%M%S_%f"
+
+N = len(cam) + 1
+
+bkgs = {}
+for bn in bkg_names:
+    ts = bn[N:]
+    dt = datetime.strptime(ts, fmt)
+    if dt >= start:
+        res = pc.get_background_image_bytes(bn)
+        bytes = res["bytes"]
+        dtype = res["dtype"]
+        shape = res["shape"]
+        bytes = base64.b64decode(bytes.encode())
+        array = np.frombuffer(bytes, dtype=dtype)
+        array.shape = shape
+        bkgs[ts] = array
+        print(array.shape, array[0, :3])
+        break
+
+with h5py.File("bkgs.h5", "w") as f:
+    for ts, dat in bkgs.items():
+        f[f"{cam}/{ts}"] = dat
+
+
+