guard against None-valued rep_array and walk on eggshells in rounding fix

Author: rileyjmurray

pygsti/data/dataset.py

@@ -1730,8 +1730,10 @@ def _add_raw_arrays(self, circuit, oli_array, time_array, rep_array,
                 # so we need to build this up for all existings sequences:
                 self._add_explicit_repetition_counts()
 
-        dtype_info = _np.finfo(rep_array.dtype)
-        rep_array = rep_array.round(dtype_info.precision)
+        if rep_array is not None:
+            dtype_info = _np.finfo(rep_array.dtype)
+            near_zero = rep_array < 10**(-1.5*dtype_info.precision)
+            rep_array[near_zero] = 0
 
         if not record_zero_counts:
             # Go through repArray and remove any zeros, along with

test/unit/util.py

@@ -219,8 +219,11 @@ def __getattr__(self, name):
         except AttributeError as err:
             if name in self.__ns_props__:
                 return self.__ns_props__[name](self)
-            else:
-                raise err
+            # else:
+            #     raise err
+            return None
+            # ^ necessary to avoid cursed issues that can arise when a call to pyest.main(...)
+            #   ends up triggering a test which needs the Namespace class.
 
     def property(self, fn):
         """Dynamic namespace property"""