modified search metadata to return Astropy.Table

changelog/3950.breaking.rst

@@ -0,0 +1 @@
+Modified the `search_metadata` function inside `sunpy.net.jsoc` to return the Astropy.Table instead of pandas dataframe.

sunpy/net/jsoc/jsoc.py

@@ -400,13 +400,13 @@ def search_metadata(self, *query, **kwargs):
         """
         query = and_(*query)
         blocks = []
-        res = pd.DataFrame()
+        res = astropy.table.Table()
         for block in walker.create(query):
             iargs = kwargs.copy()
             iargs.update(block)
             iargs.update({'meta': True})
             blocks.append(iargs)
-            res = res.append(self._lookup_records(iargs))
+            res = astropy.table.vstack(self._lookup_records(iargs))
 
         return res
 
@@ -863,8 +863,13 @@ def _lookup_records(self, iargs):
 
         # If the method was called from search_metadata(), return a Pandas Dataframe,
         # otherwise return astropy.table
+
         if isMeta:
-            return r
+            tbl = astropy.table.Table.from_pandas(r)
+            index = astropy.table.Column(r.index.values)
+            tbl.add_column(index, name='Index', index = 0)
+            tbl.add_index('Index')
+            return tbl
 
         if r is None or r.empty:
             return astropy.table.Table()

sunpy/net/jsoc/tests/test_jsoc.py

@@ -258,10 +258,9 @@ def test_make_recordset():
 def test_search_metadata():
     metadata = client.search_metadata(a.Time('2014-01-01T00:00:00', '2014-01-01T00:02:00'),
                                       a.jsoc.Series('aia.lev1_euv_12s'), a.jsoc.Wavelength(304*u.AA))
-    assert isinstance(metadata, pd.DataFrame)
-    assert metadata.shape == (11, 176)
-    for i in metadata.index.values:
-        assert (i.startswith('aia.lev1_euv_12s') and i.endswith('[304]'))
+    assert isinstance(metadata, astropy.table.Table)
+    assert (len(metadata), len(metadata.colnames)) == (11, 177)
+    assert metadata.primary_key[0] == 'Index'
 
 
 @pytest.mark.remote_data