python实现多对多映射

import pandas as pd
import numpy as np
import os
import xlsxwriter
import itertools

filepath = "F:\python代码\多对多映射\"   # 读取源文件路径
mdturn = pd.read_excel(filepath + r"mdturn.xlsx")
phid = pd.read_excel(filepath + r"phid.xlsx")
print("已读取所有表格")

phid.drop_duplicates(subset=['id', '款', '色', '码'], keep='last', inplace=True)
print("phid已去重复")
# 实现多对多映射
data = pd.DataFrame([item for item in itertools.product(mdturn['店'], phid['id'])], columns=['店', 'id'])

data.to_excel('ph.xlsx', index=False)