판매 기록 데이터를 통해 파이썬의 pandas, group 함수와 datetime 함수 그리고 numpy를 통해 학습을 진행하였다. import pandas as pd import numpy as np import matplotlib.pyplot as plt In [2]: sales_df=pd.read_csv("./csv/Sales Records.csv") In [110]: sales_df sales_df.isna().sum() Out[110]: Region 0 Country 0 Item Type 0 Sales Channel 0 Order Priority 0 Order Date 0 Order ID 0 Ship Date 0 Units Sold 0 Unit Price 0 Unit Cost 0 Total Re..