Avoid dropping column if synonym_N column only is partially empty

IAMconsortium · Nov 7, 2019 · 821eb68 · 821eb68
1 parent 3707303
commit 821eb68
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pyam/iiasa.py b/pyam/iiasa.py
@@ -251,7 +251,7 @@ def regions(self, include_synonyms=False):
             synonyms = df['synonyms'].apply(pd.Series)
             synonyms = synonyms.rename(columns=lambda x: 'synonym_' + str(x))
             # remove synonym_0 if no synonyms retrieved at all
-            synonyms = synonyms.dropna(axis=1)
+            synonyms = synonyms.dropna(axis=1, how='all')
             df = pd.concat([df[:], synonyms[:]], axis=1)
             df = df.drop(columns=['id', 'synonyms', 'parent', 'hierarchy'])
             df = df.rename(columns={'name': 'region'})