revert(measurement): restoring main version of run_info.py.

pyscan/measurement/run_info.py

@@ -63,10 +63,7 @@ def __init__(self):
         self.average_d = -1
 
         self.verbose = False
-        try:
-            self._pyscan_version = get_pyscan_version()
-        except:
-            pass
+        self._pyscan_version = get_pyscan_version()
 
     def check(self):
         '''Checks to see if runinfo is properly formatted. Called by Experiment object's `run()` methods.
@@ -91,6 +88,20 @@ def check(self):
         if num_av_scans > 1:
             assert False, "More than one average scan is not allowed"
 
+        # make sure there are no empty scans inbetween used scans.
+        used_scan_found = False
+        scans = self.scans
+        for i in range(len(scans)):
+            count_down = len(scans) - i - 1
+            if used_scan_found is False:
+                if not (isinstance(scans[count_down], PropertyScan) and len(scans[count_down].input_dict) == 0):
+                    used_scan_found = True
+                    used_scan_index = count_down
+            else:
+                assert not (isinstance(scans[count_down], PropertyScan) and len(scans[count_down].input_dict) == 0), \
+                    (f"Found empty PropertyScan (scan{count_down}) below used scan (scan{used_scan_index}).\n"
+                     + "Scans must be populated in sequential order.")
+
     @property
     def scans(self):
         ''' Returns array of all scans