Initial charts

data_utils.py

@@ -0,0 +1,13 @@
+import pandas as pd
+
+
+def get_categorical_stats(
+    df: pd.DataFrame, category_col: str, value_col: str
+) -> pd.DataFrame:
+    # Drop records where value is not numeric before grouping...
+    df = df.copy()
+    df[value_col] = pd.to_numeric(df[value_col], errors="coerce")
+    df = df[df[value_col].notna() & df[value_col] > 0]
+    # ... then carry on.
+    group = df[[category_col, value_col]].groupby(category_col)
+    return group[value_col].agg(["mean", "min", "max", "median"])