fix: mutating input df in viz.py (#11795)

2020-11-25 12:55:00 +02:00 · 2020-11-25 12:55:00 +02:00 · 38f67a44ca
parent f27ebc4be5
commit 38f67a44ca
1 changed files with 1 additions and 0 deletions
--- a/superset/viz.py
+++ b/superset/viz.py
@ -1671,6 +1671,7 @@ class DistributionBarViz(BaseViz):
        # pandas will throw away nulls when grouping/pivoting,
        # so we substitute NULL_STRING for any nulls in the necessary columns
        filled_cols = self.groupby + columns
+        df = df.copy()
        df[filled_cols] = df[filled_cols].fillna(value=NULL_STRING)

        row = df.groupby(self.groupby).sum()[metrics[0]].copy()