Use category converter on NumPy str/bytes also.

QuLogic · QuLogic · commit a29e26d1df62 · 2016-10-09T03:28:19.000-04:00
diff --git a/lib/matplotlib/category.py b/lib/matplotlib/category.py
@@ -131,7 +131,10 @@ def _set_seq_locs(self, data, value):
                 self.locs.append(value)
                 value += 1
 
+
 # Connects the convertor to matplotlib
 units.registry[str] = StrCategoryConverter()
-units.registry[bytes] = StrCategoryConverter()
+units.registry[np.str_] = StrCategoryConverter()
 units.registry[six.text_type] = StrCategoryConverter()
+units.registry[bytes] = StrCategoryConverter()
+units.registry[np.bytes_] = StrCategoryConverter()
