Create helper/vintage_helpers.py

helper/vintage_helpers.py

@@ -0,0 +1,15 @@
+import pandas as pd
+
+
+def create_booking_vintage(
+    df,
+    booking_date_col="booking_date"
+):
+
+    df = df.copy()
+
+    df["booking_vintage"] = (
+        pd.to_datetime(df[booking_date_col]).dt.strftime("%Y%m")
+    )
+
+    return df