BUG: use pprint_thing() rather then str() in Block.repr()

Author: y-p

pandas/core/internals.py

@@ -49,9 +49,10 @@ def set_ref_items(self, ref_items, maybe_rename=True):
         self.ref_items = ref_items
 
     def __repr__(self):
-        shape = ' x '.join([str(s) for s in self.shape])
+        shape = ' x '.join([com.pprint_thing(s) for s in self.shape])
         name = type(self).__name__
-        return '%s: %s, %s, dtype %s' % (name, self.items, shape, self.dtype)
+        result = '%s: %s, %s, dtype %s' % (name, self.items, shape, self.dtype)
+        return com.console_encode(result) # repr must return byte-string
 
     def __contains__(self, item):
         return item in self.items