add the basic lookuptable required for selecting things from the vamdc

database

astroquery/vamdc/load_species_table.py

@@ -0,0 +1,26 @@
+# Licensed under a 3-clause BSD style license - see LICENSE.rst
+from astropy import log
+from ..splatalogue.load_species_table import SpeciesLookuptable
+
+
+def species_lookuptable():
+
+    log.info("Loading molecular line ID database")
+
+    from vamdclib import nodes
+    from vamdclib import request as r
+
+    nl = nodes.Nodelist()
+    nl.findnode('cdms')
+    cdms = nl.findnode('cdms')
+
+    request = r.Request(node=cdms)
+
+    # Retrieve all species from CDMS
+    result = request.getspecies()
+    molecules = result.data['Molecules']
+
+    lookuptable = SpeciesLookuptable({molecules[key].OrdinaryStructuralFormula: key
+                                      for key in molecules})
+
+    return lookuptable