Ensures open_mfdataset attributes are retained

Uses attributes from first file opened by `open_mfdataset`.
pydata · Mar 24, 2017 · 4d9fd6b · 4d9fd6b
1 parent 489ded4
commit 4d9fd6b
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/xarray/backends/api.py b/xarray/backends/api.py
@@ -437,7 +437,8 @@ def open_mfdataset(paths, chunks=None, concat_dim=_CONCAT_DIM_DEFAULT,
                    lock=None, **kwargs):
     """Open multiple files as a single dataset.
 
-    Experimental. Requires dask to be installed.
+    Requires dask to be installed.  Attributes from the first dataset file
+    are used for the combined dataset.
 
     Parameters
     ----------
@@ -515,6 +516,8 @@ def open_mfdataset(paths, chunks=None, concat_dim=_CONCAT_DIM_DEFAULT,
     else:
         combined = auto_combine(datasets, concat_dim=concat_dim, compat=compat)
     combined._file_obj = _MultiFileCloser(file_objs)
+    combined.attrs = datasets[0].attrs
+
     return combined