updated from Atlas

attic/strings-bytes/category_demo.py

@@ -0,0 +1,15 @@
+import sys
+import unicodedata
+
+categories = set()
+
+for i in range(sys.maxunicode):
+    char = chr(i)
+    name = unicodedata.name(char, None)
+    if name is None:
+        continue
+    cat = unicodedata.category(char)
+    if cat[0] not in categories:
+        print('U+%04x' % i, char.center(6),
+              cat, name, sep='\t')
+        categories.add(cat[0])