ensure AnnData.add is always a dict

as expected by code elsewhere
yanyanzou0721 · May 1, 2017 · 5c935ad · 5c935ad
1 parent 2d10bdd
commit 5c935ad
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/scanpy/classes/ann_data.py b/scanpy/classes/ann_data.py
@@ -432,7 +432,7 @@ def __init__(self, data, smp=None, var=None, add=None, dtype='float32', single_c
         self.var = BoundStructArray(var, VAR_INDEX, (self, 'var'), self.n_vars, var_keys_multicol)
         self._check_dimensions()
 
-        self.add = add
+        self.add = add or {}
 
     def __contains__(self, k):
         raise AttributeError("AnnData has no attribute __contains__, don't check `in adata`.")