made sure all `metrics` are int

app.py

@@ -52,6 +52,10 @@ df["Name"] = df.author.apply(lambda x: x["fullname"])
 df["username"] = df.author.apply(lambda x: x["name"])
 df["totalReactions"] = df.reactions.apply(lambda x: sum([_["count"] for _ in x]))
 df["Num of posts"] = 1
+
+# Ensure metrics columns are integers
+df[metrics] = df[metrics].astype(int)
+
 data = (
     df.groupby(["username", "Name"])[metrics]
     .sum()