add init_seq_func to focussingSequence function. Add 'start_idx' key to sequenc control dictionary (see getFocusSequencePars). Rewrite aps

focus_seq_Z1000_IXon.py

@@ -17,6 +17,22 @@ import argparse as ap
 import subprocess as sp
 import numpy as np
 import socket
+import pathlib as pl
+
+
+def init_seq(seq_kwds):
+    pt = pl.Path(seq_kwds["root_filename"])
+
+    foc_files = list(
+        pt.absolute().parent.glob("{}_[0-9][0-9][0-9][0-9].fit".format(pt.stem))
+    )
+
+    seq_kwds["start_idx"] = 1
+    N = len(foc_files)
+    if N > 0:
+        seq_kwds["start_idx"] = N
+
+    return 0
 
 
 def set_focus(foc_val):
@@ -51,6 +67,6 @@ if __name__ == "__main__":
         description="Zeiss-1000 and Andor Ixon EMCCD hardware: focussing sequence implementation.",
     )
 
-    ret = focussing_app(parser, set_focus, get_image)
+    ret = focussing_app(parser, init_seq, set_focus, get_image)
 
     sys.exit(ret)