import os import polars as pl dtypes = { 'customer_id': str, 'gender_cd': str, 'postal_cd': str, 'application_store_cd': str, 'status_cd': str, 'category_major_cd': str, 'category_medium_cd': str, 'category_small_cd': str, 'product_cd': str, 'store_cd': str, 'prefecture_cd': str, 'tel_no': str, 'postal_cd': str, 'street': str, 'application_date': str, 'birth_day': pl.Date } df_customer = pl.read_c
