Replace uuid strings with pleasant names in dot

dask/dot.py

@@ -52,6 +52,7 @@ def name(x):
 
 
 _HASHPAT = re.compile('([0-9a-z]{32})')
+_UUIDPAT = re.compile('([0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12})')
 
 
 def label(x, cache=None):
@@ -68,21 +69,30 @@ def label(x, cache=None):
     >>> x
     'x-81dc9bdb52d04dc20036dbd8313ed055-hello'
 
+    >>> label(x)
+    'x-#-hello'
+
+    >>> from uuid import uuid1
+    >>> x = 'x-%s-hello' % uuid1()
+    >>> x  # doctest: +SKIP
+    'x-4c1a3d7e-0b45-11e6-8334-54ee75105593-hello'
+
     >>> label(x)
     'x-#-hello'
     """
     s = str(x)
-    m = re.search(_HASHPAT, s)
-    if m is not None:
-        for h in m.groups():
-            if cache is not None:
-                n = cache.get(h, len(cache))
-                label = '#{0}'.format(n)
-                # cache will be overwritten destructively
-                cache[h] = n
-            else:
-                label = '#'
-            s = s.replace(h, label)
+    for pattern in (_HASHPAT, _UUIDPAT):
+        m = re.search(pattern, s)
+        if m is not None:
+            for h in m.groups():
+                if cache is not None:
+                    n = cache.get(h, len(cache))
+                    label = '#{0}'.format(n)
+                    # cache will be overwritten destructively
+                    cache[h] = n
+                else:
+                    label = '#'
+                s = s.replace(h, label)
     return s