Rename variable `my_pc` to t0

Inst_eddies/inst_eddies.py.in

@@ -19,7 +19,7 @@ import csv
 
 def process_1_file(bbox, nco_instance, nc_file, cropped_fname, unpacked_fname,
                    inst_eddies_exe, d, my_slice, writer):
-    my_pc = time.perf_counter()
+    t0 = time.perf_counter()
 
     if bbox:
         xmin, xmax, ymin, ymax = bbox
@@ -35,12 +35,12 @@ def process_1_file(bbox, nco_instance, nc_file, cropped_fname, unpacked_fname,
         nc_file = cropped_fname
 
     nco_instance.ncpdq(nc_file, output = unpacked_fname, options = ["--unpack"])
-    elapsed_NCO = time.perf_counter() - my_pc
-    my_pc = time.perf_counter()
+    elapsed_NCO = time.perf_counter() - t0
+    t0 = time.perf_counter()
     subprocess.run([inst_eddies_exe, unpacked_fname, unpacked_fname],
                    check = True, input = f"&dates_nml date = {d}, "
                    f"slice = {my_slice}/\n", text = True)
-    elapsed_Fortran = time.perf_counter() - my_pc
+    elapsed_Fortran = time.perf_counter() - t0
     writer.writerow([d, elapsed_NCO, elapsed_Fortran])