np.dtype does not support unicode strings on python 2.7 so encode before creating

jenshnielsen · jenshnielsen · commit 222ed1422a80 · 2016-07-31T14:16:14.000+01:00
diff --git a/lib/matplotlib/mlab.py b/lib/matplotlib/mlab.py
@@ -2596,8 +2596,10 @@ def mapped_r2field(name):
               if desc[0] not in key]
     r2desc = [(mapped_r2field(desc[0]), desc[1]) for desc in r2.dtype.descr
               if desc[0] not in key]
-    newdtype = np.dtype(keydesc + r1desc + r2desc)
-
+    all_dtypes = keydesc + r1desc + r2desc
+    if six.PY2:
+        all_dtypes = [(a[0].encode('utf-8'), a[1]) for a in all_dtypes]
+    newdtype = np.dtype(all_dtypes)
     newrec = np.recarray((common_len + left_len + right_len,), dtype=newdtype)
 
     if defaults is not None:
